Mastering Granite Polishing with Dremel Tools

Dremel tool in action on granite surface

Intro

When it comes to achieving that flawless shine on granite, many people might underestimate the impact of using the right tools, particularly when it involves a Dremel tool. Granite polishing isn't just a task; it's an art form that combines skill, precision, and knowledge of materials. With just a bit of practice and the right techniques, you can transform your dull granite into a strikingly beautiful surface.

Understanding the fundamentals of granite polishing is essential, whether you are a weekend warrior or a seasoned professional. This article aims to delve deeper into the techniques and considerations involved in polishing granite specifically with a Dremel tool, ensuring you feel confident and equipped to tackle any project.

The journey toward perfect granite polishing requires not just an understanding of the tools available, but also a grasp of the various materials you will encounter. As we explore the different facets of this craft, keep in mind the intricate nature of the work involved. With that in mind, let's kick off this guide with an overview of the types of collectibles pertinent to our topic.

Understanding Granite and Its Properties

Granite is not just a pretty face in the world of stone; it has a kaleidoscope of qualities that make it a favorite among builders, artists, and hobbyists alike. Understanding granite and its properties sets the stage for effective polishing techniques using Dremel tools. This section dives into the essence of granite, equipping readers with the knowledge that facilitates informed decisions and improved skills in granite polishing.

Overview of Granite

Granite is an igneous rock formed from the slow crystallization of magma beneath the Earth's surface. Characterized by its granular texture, this durable stone comes in various colors and patterns, making it a staple in construction and artistic projects. Its presence can often be seen in countertops, monuments, and sculptures.

In the realm of polishing, knowing which type of granite you are working with is crucial. Not all granites are created equal, and some may have more comparable qualities when it comes to polishing. Some might have a finer grain structure while others have larger crystals that can be more difficult to polish. The end goal is always a brilliant, glossy finish that highlights the beauty of the stone.

Granite Composition and Structure

When you break granite down to its core, you find a mix of minerals that contribute to its unique structure. Typically, granite comprises quartz, feldspar, and mica, each adding its distinct color and texture. For instance, quartz gives it toughness, while feldspar contributes to the color variations.

Understanding the composition helps in predicting how the granite will react to different polishing tools and techniques. If your granite has more quartz, it might be tougher to polish than a granite rich in feldspar.

Granite’s porosity is another aspect worth noting. Though it is considered one of the more durable stones, its porous nature can trap dirt and moisture, which is something to consider before diving into the polishing process.

Importance of Polishing Granite

Polishing isn’t just about aesthetics; it's a way to protect the granite surface from wear and tear. When granite is polished, it becomes less susceptible to stains and scratches, extending its lifespan. A well-polished surface not only looks fantastic but also makes cleaning a breeze.

Furthermore, polishing enhances the stone's natural patterns, bringing out colors that may be hidden under layers of grime. As you embark on your granite polishing journey, remember that the effort put into this process will be rewarded with a surface that not only shines but reflects your skills and dedication.

The Role of Dremel Tools in Polishing

When it comes to polishing granite, the right tools make all the difference. Dremel tools stand out as a top choice among hobbyists and professionals alike for their versatility and precision. They allow for detailed work that is essential when aiming for a polished finish on granite surfaces. With a variety of attachments and accessories, Dremel tools can handle coarse grinding as well as fine polishing, perfectly suiting the needs of granite enthusiasts.

The beauty of using Dremel tools lies in their compact design and ease of use. Unlike larger grinders, Dremels provide greater control, especially in intricate spaces or on smaller pieces. This control helps users focus on specific areas without inadvertently affecting the entire surface, making them ideal for both delicate and substantial granite work. The ability to switch out attachments easily further adds to their convenience, allowing a user to adapt quickly to different tasks.

Choosing the Right Dremel Tool

Selecting the appropriate Dremel tool for granite polishing can feel like finding a needle in a haystack. With numerous options available, it’s vital to consider what will work best for your specific project. A rotary tool, such as the Dremel 4000, is often recommended for its reliability and ability to handle various attachments.

The Dremel 8220, being cordless, offers mobility, which is a blessing when maneuvering around larger granite pieces or installations.

Key factors to consider include:

Power: Higher RPM (Revolutions Per Minute) ratings usually indicate better performance.
Ergonomics: Look for tools that provide a comfortable grip and are lighter to reduce fatigue during long sessions.
Versatility: Tools that accommodate multiple attachments can adapt to different polishing needs over time.

Accessories for Granite Polishing

Grinding Bits

The backbone of any polishing project is the grinding bits. These attachments are vital for removing rough spots and imperfections before moving on to finer polishing stages. Diamond-coated grinding bits are particularly effective, as their hardness ensures they don’t wear down easily when working with granite’s tough surface.

One key characteristic of these bits is their ability to handle significant material removal. This feature makes them a popular choice among users aiming for an efficient process. However, it’s essential to use them properly, as excessive pressure can lead to scratches rather than a smooth finish. Hence, a delicate touch goes a long way.

Polishing Pads

Once the surface is adequately ground down, the next step involves using polishing pads. These pads, often made from foam or felt, are designed to buff the granite to a glossy shine. The key characteristic of polishing pads is their finishing capacity, which allows for a high-gloss outcome without compromising the stone’s integrity.

A unique feature of these pads is that they come in various grit levels. Starting with lower grits for initial polishing and gradually moving up to finer grits can maximize results. However, one disadvantage may arise; using the wrong grit can lead to a less-than-desirable finish.

Sanding Disks

Following grinding, sanding disks come into play for smoothing the surface further. These disks are particularly useful for aligning the textures and providing an even foundation for the final polish. The flexibility of sanding disks allows them to adapt to the possible imperfections remaining after grinding.

However, an important consideration is that sanding disks typically require some experience to utilize effectively. They can generate significant dust and require frequent changing, which might not please everyone using them for an extended project.

In sum, the role of Dremel tools in granite polishing is indeed a fundamental one. Proper selection and understanding of these tools and their accessories empower users to achieve exceptional results, transforming raw granite into stunning surfaces.

Preparation for Polishing

Getting ready for polishing granite with a Dremel tool isn’t just about yanking out your equipment and getting to work. It’s a fine blend of preparation that can make or break the entire project. Proper preparation lays the groundwork for achieving that coveted glossy surface, and it can save you a heap of time and frustration down the road. Skipping this stage might lead to uneven finishes or damage, leaving one feeling like they’ve been trying to build a house of cards in a windstorm.

Selecting the Right Granite Surface

Choosing the right granite surface to work on is crucial. Not all granite varieties are created equal. Some have more intricate patterns or are softer, which can require different approaches. Before diving in, take a step back. Look at the surface, checking for any cracks, chips, or uneven spots.

Ask yourself:

Is the granite slab structurally sound?
What's its finish like? A polished surface may require different treatment compared to a honed one.

If you pick a surface with undetected issues, it can mess up your entire polishing procedure. It's like trying to solve a jigsaw puzzle with missing pieces—frustrating and ineffective.

Cleaning and Inspecting the Surface

Once the right granite is selected, cleaning it becomes a non-negotiable step. Dirt, dust, or grime can interfere with the polishing process and lead to disappointing results.

First things first: Use a soft, damp cloth to wipe surface dust and dirt away. Make sure there are no residues left from previous cleaning products. An untreated surface is the key to a successful application.
Inspect the surface thoroughly. Look out for any scratches or imperfections. Often, these can be a blight on your efforts, so addressing them early on can save hours later.

If you spot deeper scratches, you may need to start with a more aggressive grinding bit before polishing. This is like checking the tires on your car before hitting the road. A small oversight can result in a rocky journey.

Setting Up Your Workspace

Finally, setting up your workspace is essential. Having a well-organized, efficient workspace can make the task feel less like a chore and more like a craft. Here’s how to go about it:

Choose a spacious, well-lit area: Fresh air and good lighting are your allies. It’s easier to spot blemishes and see your polish in action.
Lay out all your tools and materials: Every tool within arm's reach means fewer interruptions. You don’t want to be searching for a polishing pad with grinding dust in the air. Feel free to include:
Dress your workstation for safety: Lay down protective coverings over surfaces that could suffer from spills or scratches. This can save valuable time later on when cleaning up.

Dremel tool with appropriate accessories
Polishing pads
Cleaning supplies
Safety goggles, gloves, and a mask

Getting everything just right doesn’t only create a sense of order; it also leads to efficiency in your work. After all, time is money, and the smoother the process, the better the results.

Remember: Proper preparation isn’t just about organizing your space and tools; it’s about setting yourself up for success and ensuring your granite polishing endeavors go off without a hitch.

Step-by-Step Granite Polishing Process

The process of polishing granite can seem daunting at first, but having a clear strategy can turn an intimidating task into a manageable project. Each step plays a crucial role in transforming raw granite into a stunning, mirror-like finish that can do justice to its natural beauty. Understanding the step-by-step polishing process not only ensures that you achieve a high-quality finish but also saves time and materials. Failing to follow these steps could lead to scratches, an uneven surface, or a finish that doesn’t shine. Thus, investing attention in each phase is well worth the effort.

Initial Grinding

The journey starts with initial grinding, which lays the foundation for all subsequent steps. Here, the main goal is to remove any extensive imperfections, like deep scratches, fissures, or lippage. This stage is where a coarse grinding bit is your best ally.

Choose the Right Grit: Start with a coarse grinding bit, usually around 50 grits. This bit quickly removes material and prepares the surface for finer treatments.
Consistent Motion: Move the Dremel tool steadily over the surface. It's essential to keep the tool in continuous motion to avoid creating grooves or uneven areas.
Check Your Progress: Periodically pause to examine your work. This ensures you’re not over-grinding any spot, which could lead to unwanted changes in the stone's profile.

Remember, patience is key in this phase. The grinding will reveal the character of the granite, lifting any dullness it may have.

Intermediate Sanding

Once the grinding nishes, intermediate sanding takes the stage. This step acts like a bridge from rough to smooth. It’s designed to further smooth out the surface and eliminate any leftover grinding marks.

Use a Higher Grit: Shift to a finer grit for this part—around 200 to 400 grit should suffice. These sanding disks help reduce the harshness left by the initial grinding.
Cross-Hatch Technique: Employ a cross-hatch pattern while sanding. This technique helps reach areas that the grinder might not have touched and ensures a more uniform finish overall.
Maintain Frequency: Spend equal time on each portion of the granite surface to keep things even and consistent.

Engaging in intermediate sanding feeds the surface preparing it for the final polish. Without this phase, the final step might miss its mark, leaving imperfections trapped beneath.

Final Polishing

Finally, the cherry on top is the final polishing. This step is where the magic happens, as the granite takes on its beautiful luster. Selecting the right tools becomes essential here.

Polishing Pads: Use specialized polishing pads, often diamond-infused, that can deliver that coveted shine. Start with a finer grit, ideally around 1000 to 3000 grit.
Light Pressure: Apply gentle pressure while working in small sections. The idea is to gradually buff the surface without forcing the tool too much, which can damage the granite or the pads themselves.
Inspect for Shine: Regularly check your progress. A polished surface should ignite an impressive shine. If it doesn't, you may have to repeat this step with a finer grit.

Well-maintained polished granite countertop

"Polishing is not just about producing a shiny effect; it's about enhancing the natural beauty of the stone."

Final polishing is both an art and a science, ensuring that your hard work culminates into a breathtaking finish worthy of admiration.

By following these steps—initial grinding, intermediate sanding, and final polishing—you pave the way to mastering granite polishing using a Dremel tool. With practice and a keen eye, you’re guaranteed to produce stunning results that reflect skill and attention to detail.

Common Challenges in Granite Polishing

Polishing granite isn’t just a walk in the park; it comes with a slew of challenges that can trip up even the most seasoned hands. This section emphasizes the importance of understanding these hurdles, as overcoming them not only elevates the quality of your work but also boosts your confidence. Mastering the intricacies of granite polishing can turn an ordinary slab into a magnificent showpiece, and being aware of potential pitfalls is key.

Dealing with Scratches and Imperfections

Every granite slab tells a story, but sometimes that story includes scratches or imperfections that can spoil its beauty. Whether it's a light scuff from handling or deeper scratches due to heavy usage, these flaws can be disheartening. The good news? Most of these can be rectified with the right techniques.

Start by identifying the depth of the scratch. If it’s surface-level, light sanding with a fine grit can work wonders. For deeper scratches, you might need to take a more aggressive approach, like using coarse grinding pads first and following up with finer ones. There’s no magic formula that fits all, so being patient and testing various methods may be your best bet.

Managing Dust and Residue

If you've ever polished granite, you'll know that dust can become your unwelcome companion. It not only clouds the workspace but can also settle on the freshly polished surface, marring your hard work. This makes managing dust a crucial task.

To help mitigate this, consider using a vacuum with a HEPA filter to suck up fine particles before they settle. Wet polishing can also substantially reduce dust. With this technique, the moisture binds the dust particles, keeping your environment cleaner—a win-win if you ask me. Wearing a dust mask during the process is also wise. After all, nobody wants to end up coughing like a smoker after a long day at work.

Achieving Uniformity in Finish

Achieving a flawless, uniform finish is something every granite polisher dreams of. Yet, achieving that dreamy result can feel more like chasing a mirage. Uneven patches can create an unsightly look and ruin the overall aesthetic appeal of your granite surface.

To tackle this challenge, consistency is key. Make sure to use the same application technique throughout the polishing process, and pay close attention to your pressure and speed. Moving too quickly can leave behind uneven spots, while applying too much pressure can lead to burns or polish lines. Moreover, it's always a good idea to inspect your work frequently. A lack of attention can lead to regret later on.

"Patience is the key to unlocking the elegance hidden within granite."

In summary, understanding these common challenges equips you with the foresight needed to navigate the complexities of granite polishing. Consider each issue carefully, employ the right techniques, and above all, embrace the learning process. Over time, your skills will flourish, and you'll be able to transform rough granite into polished masterpieces.

Safety and Maintenance Tips

When diving into the world of granite polishing with a Dremel tool, it's crucial to prioritize both safety and maintenance. Working with power tools can open the door to potential hazards. Hence, understanding the right safety measures and maintaining your equipment not only ensures your wellbeing but also optimizes the performance of your tools. Following sound practices keeps your projects running smoothly and extends the lifespan of your equipment, paving the way for consistently high-quality results.

Personal Protective Equipment (PPE)

Using the correct Personal Protective Equipment (PPE) is non-negotiable in any polishing job. Think of it as your first line of defense against accidental injuries and exposure to dust. The main types of PPE you should consider include:

Safety goggles: These protect your eyes from flying debris. Even the tiniest particles can cause serious harm if they get into your eyes.
Dust mask or respirator: Protects your lungs from inhaling granite dust, which can be harmful over time. Choosing a respirator rated for fine particles is wise, especially during heavy polishing.
Hearing protection: A quality pair of earplugs or noise-canceling headphones can shield you from the high-pitched whine of the Dremel.
Gloves: While not always necessary, wearing sturdy gloves can improve your grip and provide an extra layer of protection against sharp edges. Just avoid overly bulky ones that might limit your dexterity.

By investing in good-quality PPE, you'll be safeguarding yourself against avoidable injuries, making your polishing endeavors not just productive but also safe.

Tool Maintenance and Care

Maintenance of your Dremel tool is key to ensuring its longevity and efficiency. A well-maintained tool will perform better and yield superior results. Here are some essential maintenance steps:

Cleaning: After every polishing session, take the time to clean your Dremel. Use a dry cloth to wipe down the body and work area. For hard-to-reach spots, a brush can help clear out debris.
Check the attachments: Inspect grinding bits, polishing pads, and sanding disks for wear and tear. Regularly replacing your attachments can prevent underwhelming performance.
Lubrication: Keep moving parts well-lubricated according to the manufacturer's recommendations. This reduces wear and tear, contributing to a smoother operation.
Battery care: If you're using a cordless Dremel, be aware of proper battery care practices. Overcharging or leaving it unused for long periods can significantly shorten battery life.

Adhering to these basic maintenance practices not only saves money but enhances your overall experience while polishing granite.

Workspace Safety Measures

Creating a safe workspace is another crucial aspect of the polishing process. The environment where you work can significantly impact your effectiveness and safety. To prepare a safe workspace, consider these elements:

Proper lighting: Ensure the area is well-lit. Poor visibility can lead to mistakes and accidents.
Organized tools: Keep your workspace tidy. Having tools strewn about can result in tripping hazards or accidental cuts.
Ventilation: Due to the dust generated during polishing, work in well-ventilated areas or consider using air purifiers that can filter out fine particles.
Fire safety: While polishing granite is unlikely to spark a fire, having a fire extinguisher nearby is a good precaution. Check that it's easily accessible.

By recognizing potential risks and implementing effective strategies, you not only protect yourself but also foster a productive atmosphere that promotes focus and creativity in your granite polishing endeavors.

"Safety isn’t expensive, it’s priceless. A little prevention goes a long way to ensuring your polishing project is both enjoyable and successful."

Engaging in granite polishing can be an exceptionally rewarding task. When you actively ensure safety and maintain your tools, you’ll set yourself up for a satisfying and skill-enhancing experience.

Evaluating Finished Work

Evaluating finished work in granite polishing using a Dremel tool is paramount. Completing the process is only half the battle; assessing the result gives insight into the quality of the work and indicates areas for improvement. Not only does it enhance the overall satisfaction with the project, but it also lays a solid foundation for honing one’s skills in future endeavors.

A polished granite surface should not just gleam; it should also reflect skill and careful attention to detail. This final evaluation helps verify that the desired finish has been achieved and ensures that the granite is ready for its intended use. If discrepancies are found, adjustments can be made, leading to a refined technique that benefits every subsequent project.

Criteria for a Quality Polish

Several criteria stand out when discerning whether a granite polish is of high quality:

Surface Smoothness: Run your fingers across the surface. It should feel sleek without any noticeable rough spots. Any irregularities can detract from the appearance and could signify that more work is needed.
Clarity and Shine: Observe how the light interacts with the surface. A quality polish will have a bright, uniform sheen, devoid of dull patches.
Color Depth: Polished granite should display lively and rich colors. If it looks lackluster, that signals insufficient polishing.
Absence of Swirl Marks: Check for any leftover patterns or whirls. These come from improper technique and indicate that additional sanding or polishing might be required.

By thoroughly evaluating these aspects, one can ascertain the efficacy of their polishing efforts and make necessary adjustments, which ultimately leads to a more polished skill set.

Conducting a Final Inspection

After polishing, conducting a final inspection is crucial. This step is not just a cursory glance; it involves a detailed scrutiny of the surface.

Lighting Conditions: Ensure you're inspecting in good lighting. Natural light can reveal imperfections often missed in artificial lighting.
Streaks and Marks: Look closely for streaks, filmy residues, or remaining imperfections. If any are found, it indicates that the process needs revisit, particularly the sanding or polishing stages.
Testing for Shine: Use a soft cloth or microfiber cloth to wipe over the granite. This can help reveal any dull spots that seem fine to the eye but lack luster.
Measurement of Finish: If possible, utilize a gloss meter. This tool can quantify the shininess of the surface and ensure it meets your standards or those outlined in specific project requirements.
Structural Integrity Check: Lastly, assess any edges or corners for chips. While polishing mainly targets surface aesthetics, ensuring the durability of the edges is equally important.

Exploring Advanced Techniques

When venturing into the realm of granite polishing, understanding advanced techniques can significantly elevate the results. These methods not only refine the surface but also broaden the skill set of both enthusiasts and seasoned pros. Mastering advanced techniques means taking full advantage of the capabilities that your Dremel tool offers, ensuring that polished granite surfaces meet high standards. This section delves into two primary aspects: wet polishing versus dry polishing, and how to effectively use different grits.

Wet Polishing vs. Dry Polishing

Wet polishing and dry polishing are two contrasting approaches utilized in granite polishing. Each has its own set of advantages and drawbacks that can make a sizable difference in the final output.

Wet Polishing: This method incorporates water to dampen the polishing process. The benefits are manifold:However, wet polishing does come with its considerations. It requires more setup time due to the need for water supply and can lead to potential water damage if not managed properly.
Dry Polishing: As the name suggests, this technique skips any form of lubrication. Many find it appealing for its straightforwardness. Some key points include:On the flip side, dry polishing tends to generate more dust and can potentially lead to overheating if not monitored properly.

Reduced Dust: The water significantly minimizes dust clouds, which is easier on the lungs and helps keep your workspace tidy.
Better Finish: Wet polishing generally results in a smoother surface due to the cooling effect water has on the granite, preventing overheating that can occur during dry polishing.
Less Wear on Tools: The added lubrication of water leads to less friction, extending the lifespan of your polishing accessories.

Convenience: Quite simply, no water means less cleanup after polishing.
Controlled Environment: In certain situations, controlling your polishing environment can lead to better results, particularly if the granite is sensitive to water.
Additional Accessibility: If you're working in an area without easy access to water, dry polishing can be the preferred method.

In summary, the choice between wet and dry polishing fundamentally depends on specific needs and situations faced by the user. You might end up experimenting with both techniques to discover which yields the greatest satisfaction and results for your unique projects.

Using Different Grits Effectively

The grit of your polishing tools plays an essential role in how polished your granite surface may be. Understanding how to mix and match different grits is key for navigating the polishing process effectively.

Coarse Grit: Starting off with a coarser grit allows for the removal of deeper scratches and imperfections. Generally, a 60 to 80 grit can serve this purpose well.
Intermediate Grit: After the coarse phase, transitioning to mid-range grits like 180 to 400 helps to refine the surface. This grit smooths out the scratches from the coarser grit while still preparing the granite for finer polishing.
Fine Grit: Finally, you'll want to polish with grits upwards of 800 to 3000. These finer grits will yield a lustrous shine that brings out the inherent beauty of the granite. The use of these finer grits not only gives a polished appearance but also enriches the color of the stone.

Utilizing a systematic approach to grit levels ensures not just a shiny finish but a quality surface. You may find it helpful to keep a record of the grits you used on various projects, noting what worked best under specific conditions.

Remember: Transitioning through grits is like fine-tuning the characteristics of your granite. Each step prepares the granite for the next, leading to results that truly shine.

Resources for Further Learning

When diving into the world of granite polishing, leveraging additional resources can be invaluable. Learning doesn’t end with the basics; it’s about expanding your knowledge and honing your techniques over time. By tapping into a variety of resources, you can gain new insights, troubleshoot effectively, and continually improve your skill set.

Here’s why it matters:

Staying Updated with Techniques: The world of polishing and tools evolves. Resources help keep you informed about the latest products, techniques, and best practices that can significantly improve your work.
Deepening Knowledge: Beyond hands-on experience, books and guides offer theories and principles that can clarify confusing aspects of the polishing process. Understanding the science behind it allows for smarter decision-making when you’re at your workspace.
Community Support: Engaging in online forums and communities connects you with others interested in granite polishing. Here, you can share tips, ask questions, and find support when tackling challenging projects.
Historical and Technical Context: Learning from experts helps you appreciate granite’s properties and history, which influences your approach. Knowing why certain techniques work can enhance your craftsmanship.
Practical Troubleshooting: By accessing various resources, you’ll find practical advice for common challenges experienced in polishing. This can save time and prevent frustration when things don’t go as planned.

It’s clear that every bit of knowledge you gain is a step toward mastery in your craft. Let’s explore specific resources that can further enrich your learning experience.

Recommended Books and Guides

Books are often considered the gold standard in learning. They provide in-depth knowledge and systematic approaches to polishing granite. Some notable books to consider include:

"Granite Countertops: In the Kitchen and Bath" by Dan McGowan
This guide covers not just polishing but the entire spectrum of working with granite. Ideal for both beginners and seasoned pros, it explores maintenance, care, and aesthetic considerations.
"Stone Restoration: The Complete Guide" by James F. Barlow
Focusing on various stones, including granite, this work provides advanced techniques and guidelines on restoration efforts.
"Understanding Stone: A Handbook for Stone Conservation" by John H. G. Davis
This book drills into the geology of stone, giving readers a firm grounding in the materials they’re working with.

These texts provide comprehensive insights and can serve as quick reference tools while you work on your projects.

Online Forums and Communities

Finding a group of like-minded individuals can be a game-changer. Online forums and communities allow for interaction, sharing experiences, and collaborative learning. Popular platforms include:

Reddit: Subreddits like r/DIY and r/stonework offer spaces to connect with others, where members actively share their experiences and tips on granite polishing.
Facebook Groups: Searching for groups dedicated to stone working can also yield fruitful discussions and new contacts. These groups often feature professionals who share techniques and answer questions.
Specialized Forums: Niche forums focused specifically on stone working might have threads dedicated to granite polishing, troubleshooting, and advanced techniques that could be invaluable.

In these circles, you can ask questions, showcase your work, and witness others’ projects, which often inspire fresh ideas.

Engaging with literature and online discussions is key to refining your technique and building your knowledge base. Remember, granite polishing isn’t just about technique; it’s about appreciating the craftsmanship and the community that surrounds it.

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