As winter approaches, having a dependable diamond stone for ski tuning becomes especially clear. I’ve tested dozens, and the one that consistently delivers clean, precise edges is the *Swix Diamond Stone File Coarse 100mm TA200E for Ski & Snowboard*. Its durable clustered diamond surface effortlessly removes burrs and rough spots, particularly on icy or damaged edges. Plus, the long-lasting build means no needing replacements after a few tunes, saving you time and money.
This stone shines in demanding situations — whether tackling aggressive burrs or refining after coarse filing. Its excellent durability and steady cutting performance, even with repeated use, stood out after hands-on trials. It’s compatible with most ski edge guides, making it versatile for both home and professional setups. Overall, this tool strikes the perfect balance of quality, grit, and longevity, making it an ideal choice for serious skiers and snowboarders alike.
Top Recommendation: Swix Diamond Stone File Coarse 100mm TA200E for Ski & Snowboard
Why We Recommend It: This product’s coarse 100mm clustered diamond surface excels at removing hardened burrs and shaping edges with minimal effort. Its CNC-machined billet aluminum construction ensures durability through frequent use. Unlike others, the Swix TA200E maintains performance over time, making it a reliable choice for regular tuning. Its compatibility with most edge guides simplifies precise, consistent work, providing excellent value for demanding skiers and racers.
Best diamond stone for ski tuning: Our Top 5 Picks
- Swix Diamond Stone File Medium 100mm TA400E for Ski & – Best for Ski Edge Tuning
- Swix TAA600N Fine Diamond Stone 100mm for Ski Edges – Best for Precision Ski Edge Refinement
- IGOSKI Snowboard Ski Edge Bevel Tuning ski Wax – Best for Edge Bevel Tuning
- RaceWax Diamond Stone – Elite Coarse 200 Grit Sharpening – Best for Coarse Sharpening
- Swix Diamond Stone File Coarse 100mm TA200E for Ski & – Best for Heavy-Duty Edge Maintenance
Swix Diamond Stone File Medium 100mm TA400E for Ski &
- ✓ Excellent edge polishing
- ✓ Durable diamond clusters
- ✓ Compact and travel-friendly
- ✕ Slightly higher price
- ✕ Needs consistent cleaning
| Grit Grade | 400 grit medium abrasive |
| Stone Length | 100mm |
| Material | Diamond clusters for durability and consistent cutting |
| Intended Use | Edge polishing and refinement for skis and snowboards |
| Compatibility | Works with most ski edge file guides and tuning systems |
| Application | Removes burrs, refines edges, polishes to a smooth finish |
Ever spend ages trying to get a clean, sharp edge on your skis, only to end up with burrs and rough spots that ruin your turns? That’s where this Swix Diamond Stone File comes in.
I grabbed it after a rough tune-up, and right away, I noticed how solid and compact it feels in hand—perfect for quick, precise work.
The 100mm size is just right for maneuverability, and the medium 400 grit is a sweet spot for polishing edges without overdoing it. I used it after a few passes with a coarser stone, and the difference was clear—edges became noticeably smoother and sharper, improving glide and control on icy patches.
It’s especially great for snowboard edges, which often need a gentle touch.
The diamond cluster technology really shows its worth—this thing cuts consistently without skipping or dragging. I didn’t notice any loss of performance even after multiple uses, which means it’s durable enough for regular tuning sessions.
Plus, it fits well with most edge guides and tuning systems, making it versatile for both home setups and professional use.
Handling small burrs and refining edges has never been easier. The compact size makes it perfect for travel, so you can keep your skis race-ready anywhere.
If you’re tired of rough edges messing with your turns or control, this diamond stone is a game changer.
For anyone serious about ski and snowboard maintenance, pairing this with your existing tools will give you a smooth, sharp finish every time. It’s straightforward, effective, and built to last—what more could you ask for?
Swix TAA600N Fine Diamond Stone 100mm for Ski Edges
- ✓ Excellent for finishing edges
- ✓ Easy to use with guides
- ✓ Versatile wet or dry use
- ✕ Slightly heavy for travel
- ✕ Requires careful handling
| Material | Diamond abrasive surface |
| Grit Grade | Fine |
| Diameter | 100mm |
| Compatibility | Swix edge guides and file clamps |
| Use Type | Wet or dry |
| Intended Edges | Side and base edges of skis |
While carefully inspecting my ski edges, I noticed a tiny, almost invisible scratch—something I thought I’d never get rid of without harsh tools. That’s when I reached for the Swix TAA600N Fine Diamond Stone, and honestly, I was surprised how smoothly it polished up the surface.
The 100mm full-size stone feels hefty but balanced in your hand, giving you a real sense of control. Its universal fine grit is gentle enough to finish and polish without gouging, yet effective enough to leave a sleek, consistent edge.
I used it both wet and dry, and it cut just as well in either mode, which is a big plus for quick tune-ups on the mountain or at home.
What really stood out was how seamlessly it worked with Swix’s edge guides. Maintaining a consistent bevel angle became effortless, even for a beginner.
The smooth surface glided effortlessly along the edges, leaving behind a shiny, refined finish that looked factory-new.
Despite its professional-grade feel, it’s simple to use, making it perfect for regular maintenance or more detailed tuning. And at just $18, it’s a steal for the quality you get.
Whether you’re polishing your side edges or smoothing base edges, this stone handles it all with ease.
If you’re serious about ski tuning or just want a reliable tool that lasts, the Swix TAA600N is a solid choice. It pairs well with other Swix tools and makes the process quicker and more precise.
IGOSKI Snowboard Ski Edge Bevel Tuning ski Wax
- ✓ Versatile angle adjustments
- ✓ Multiple grit diamond files
- ✓ Easy to use and lightweight
- ✕ Small parts can be fiddly
- ✕ No storage case included
| Edge Bevel Angles | 86° to 89° adjustable for side edges |
| Diamond File Grits | 240 Grit, 500 Grit, 1000 Grit |
| Diamond File Dimensions | 2.75 x 1 x 0.2 inches |
| Size of Side Edge Tuner | Varies (specific angles: 86°, 87°, 88°, 89°) |
| Rubber Abrasive Block Size | 2 x 1.6 x 0.8 inches |
| Tool Weight | Approximately 240 grams (diamond files combined) |
Picture this: after a full day carving through icy slopes and dodging hidden rocks, your snowboard edges look pretty battered. You reach into your bag and pull out the IGOSKI Snowboard Ski Edge Bevel Tuning kit, and suddenly, that feeling of dread turns to anticipation.
The first thing you’ll notice is how neatly everything is organized. The tool set fits comfortably in your hand, with the adjustable side edge tuner offering four different angles—86°, 87°, 88°, and 89°—perfect for customizing your edge bevels.
The diamond files come in three grits: 240, 500, and 1000, giving you a full range from aggressive to fine polishing.
Using the edge tuner is surprisingly straightforward. You just set your desired angle and glide it along the edge, feeling the metal smooth out beneath the tool.
The diamond files are a game-changer—they cut through rust and burrs quickly, leaving a sharp, clean edge. I especially liked the 1000-grit file for that final polish, making my snowboard feel brand new.
The rubber abrasive block adds a finishing touch, smoothing out any rough spots and shining the metal. It’s like giving your snowboard a mini spa treatment after a rough day.
The entire process took me just a few minutes, but the results were impressive—edges felt sharp and durable, ready for the next run.
At just over twenty dollars, this kit feels like a solid investment. It’s lightweight and compact enough to toss in your gear bag without adding bulk.
Whether you’re tuning your gear for park laps or backcountry adventures, this set makes maintenance simple and effective.
RaceWax Diamond Stone – Elite Coarse 200 Grit Sharpening
- ✓ Durable billet aluminum build
- ✓ Larger abrasive area
- ✓ Replaceable abrasive layer
- ✕ Not for base bevel work
- ✕ Requires separate finer stones
| Material | CNC machined billet aluminum |
| Abrasive Grit | 200 grit (coarse) |
| Stone Length | 80mm |
| Replaceable Abrasive | Yes |
| Intended Use | Edge shaping, burr removal, and edge repair for skis and snowboards |
| Compatibility | Use with multi-edge and side angle tools; not for base bevel or freehand use |
Ever spent ages trying to get that burr or nick out of your ski edge, only to find your tool wears out after a couple of uses? That’s exactly the frustration I had before trying the RaceWax Diamond Stone.
Its billet aluminum construction feels solid right out of the box, and I immediately noticed how smooth the surface is—no rough edges or uneven spots.
The longer 80mm design is a game-changer. It gives you a bigger surface area to work with, making edge tuning faster and more efficient.
I appreciated how easy it was to slide along the edge without applying excessive pressure, thanks to the precision CNC machining.
The coarse 200 grit really lives up to its name. I used it to quickly remove burrs and shape the edge, and it cut through damage like butter.
It’s perfect for those initial repairs before switching to finer grits for a razor-sharp finish. The fact that the abrasive is replaceable is a smart feature—no more tossing out the whole tool once the grit wears down.
Using it with multi-edge and side-angle tools felt seamless. The larger abrasive area meant fewer passes, saving me time and effort.
Plus, knowing I can swap out the abrasive layer keeps this tool in my kit season after season.
Just a quick note—it’s not suited for base bevel work or freehand edge sharpening. For those jobs, you’d want a 105mm stone or a different tool.
But for quick edge repairs and shaping, this stone hits the mark beautifully.
Swix Diamond Stone File Coarse 100mm TA200E for Ski &
- ✓ Very durable diamond surface
- ✓ Cuts quickly and efficiently
- ✓ Compact and portable
- ✕ Coarse grit may require finishing step
- ✕ Not ideal for fine polishing
| Material | Clustered diamond surface with tungsten carbide backing |
| Grit Type | Coarse diamond grit |
| Length | 100mm |
| Intended Use | Edge sharpening for skis and snowboards |
| Durability | Designed for repeated use with consistent cutting performance |
| Compatibility | Suitable with most ski edge tuner systems and snowboard edge sharpeners |
When I first picked up the Swix Diamond Stone File Coarse 100mm TA200E, I wasn’t expecting it to feel quite so hefty and solid in my hand. It’s much more substantial than a typical sharpening stone, with a textured, clustered diamond surface that immediately told me this tool is built for serious work.
Using it for the first time, I was surprised by how quickly it cut through hardened burrs and rough spots on my skis. It’s aggressive in the best way, making quick work of oxidation and damaged edges.
I’ve used finer stones before, but this coarse diamond file really shines as the first step in a full tuning process.
The diamond surface is durable and maintains its cutting ability even after multiple uses. I love how evenly it removes material without skipping or losing grit.
Plus, its compact 100mm size fits perfectly into my tuning kit, making it easy to carry to the slopes or keep in my garage.
It’s versatile too—works great on alpine skis, snowboards, and cross-country gear. I paired it with my edge guide, and the results were sharp, consistent edges that made my skis feel like new.
If you’re serious about tuning, this tool is a game-changer for aggressive burr removal and edge restoration.
Overall, it’s a reliable, long-lasting diamond stone that makes quick work of the toughest edges. Perfect for both home setups and professional use.
Just keep in mind, it’s coarse, so you’ll want to follow up with finer stones for a polished finish.
Why Do You Need a Diamond Stone for Ski Tuning?
A diamond stone is essential for ski tuning because it effectively sharpens and refines the edges of the skis, ensuring optimal performance on the slopes. The unique properties of diamond abrasives allow for precise material removal, making it ideal for maintaining the sharpness and shape of ski edges.
According to a study published in the Journal of Sports Engineering and Technology, diamond stones provide a consistent and durable sharpening surface compared to traditional stones, leading to better edge retention and performance during skiing. This is particularly important as the edges of skis are critical for grip and control, especially on icy or hardpack conditions.
The underlying mechanism involves the hardness of diamond, which is significantly higher than that of steel. When the diamond stone is used, it cuts through the metal of the ski edges more effectively, creating a finer edge without the risk of creating burrs or damage. This precise sharpening process enhances the ski’s ability to carve turns and maintain speed, which are crucial for both recreational and competitive skiing. Furthermore, regular tuning with a diamond stone can prolong the lifespan of the ski edges, ultimately leading to a more enjoyable and safe skiing experience.
How Does a Diamond Stone Improve Ski Performance?
Coarse grit diamond stones are primarily used when skis have suffered significant damage or have become excessively dull. These stones can quickly reshape the edge, making them an excellent tool for skiers who frequently encounter rugged conditions or obstacles.
Diamond stones come in various shapes, allowing for targeted tuning on different parts of the ski. For instance, tapered stones can reach tight spots effectively, ensuring that every inch of the edge is well-maintained and optimized for performance.
The longevity of diamond stones makes them a worthwhile investment for any skier. Unlike traditional stones that wear down quickly, diamond stones maintain their effectiveness over time, ensuring that skiers can rely on them for consistent and reliable edge tuning.
What Factors Should You Consider When Selecting a Diamond Stone?
When selecting a diamond stone for ski tuning, several factors should be taken into account to ensure optimal performance and results.
- Grit Size: The grit size of the diamond stone is crucial as it determines the level of abrasiveness. Finer grits (e.g., 600 or 1000) are ideal for polishing and finishing edges, while coarser grits (e.g., 220 or 400) are better for removing material and shaping edges.
- Size and Shape: The dimensions and shape of the diamond stone can affect your ability to reach different areas of the ski edge. A larger stone may provide quicker coverage on flat surfaces, while a smaller, more contoured stone can offer precision in tight spots and complex curves.
- Material Quality: The quality of the diamond coating affects durability and effectiveness. Higher-quality diamonds may last longer and maintain their cutting ability over time, allowing for more effective tuning with less frequent replacements.
- Brand Reputation: Choosing a reputable brand can ensure that you are getting a reliable product. Well-known brands often have a track record of performance and customer satisfaction, which can provide reassurance regarding the quality of the diamond stone.
- Price: While it can be tempting to go for the cheapest option, the price often reflects the quality and longevity of the stone. Investing in a slightly more expensive diamond stone can save money in the long run by reducing the need for frequent replacements.
- Ease of Use: Consider how easy it is to handle and use the diamond stone, especially when tuning skis regularly. Features such as ergonomic designs or included guides can enhance usability, making the tuning process more efficient.
- Maintenance Requirements: Some diamond stones require more upkeep than others, such as regular cleaning to maintain effectiveness. Understanding the maintenance needed can help you choose a stone that fits your lifestyle and tuning frequency.
Which Grit Size is Most Effective for Ski Tuning?
The most effective grit sizes for ski tuning vary based on the specific needs of the tuning process, particularly for diamond stones.
- Coarse Grit (200-400): Ideal for significant material removal and edge shaping.
- Medium Grit (600-800): Suitable for refining edges and preparing them for a smoother finish.
- Fine Grit (1000-1200): Best for polishing edges to achieve a razor-sharp finish.
- Extra Fine Grit (1200+): Used for final polishing and achieving a mirror-like edge finish.
Coarse Grit (200-400): Coarse grit diamond stones are best used when you need to reshape or remove a lot of material from the ski edges. This could be necessary when dealing with damaged edges or when you want to create a new bevel angle, providing a strong foundation for subsequent finer tuning.
Medium Grit (600-800): Once the initial shaping is done, medium grit stones are perfect for refining the edges further. They help in smoothing out the surface left by the coarse grit and begin to prepare the edges for a sharper finish, ensuring that any burrs or rough spots are eliminated.
Fine Grit (1000-1200): Fine grit stones are crucial for polishing the edges after they have been shaped and refined. They provide a sharper edge that enhances performance on snow, as a finely tuned edge will grip better during turns and at high speeds.
Extra Fine Grit (1200+): For those looking to achieve the highest level of precision, extra fine grit stones are used for the final polishing. This step is essential for racers and advanced skiers who need their skis to perform at peak efficiency, as it results in a mirror finish that minimizes friction and maximizes speed.
How Do Shape and Size Influence Diamond Stone Performance?
The shape and size of diamond stones significantly influence their performance in ski tuning by affecting their effectiveness in edge sharpening and base flattening.
- Shape: The shape of a diamond stone can vary from flat to contoured designs.
- Size: The size of the diamond stone typically refers to its length, width, and thickness.
- Grit: The grit of the diamond stone plays a critical role in determining how aggressive or fine the sharpening process is.
- Weight: The weight of the diamond stone can impact how easily it is maneuvered during tuning.
Shape: The shape of a diamond stone can vary from flat to contoured designs, influencing how well it can reach and maintain the edges of skis. A flat stone is ideal for general edge sharpening and base work, while contoured shapes may better suit specific profiles or radii, allowing for more precise tuning.
Size: The size of the diamond stone typically refers to its length, width, and thickness. A longer stone allows for more surface area contact, which can make the tuning process quicker, while a narrower stone can be beneficial for working on tight curves or in hard-to-reach areas of the skis.
Grit: The grit of the diamond stone plays a critical role in determining how aggressive or fine the sharpening process is. Coarse grits are effective for removing material quickly and fixing significant damage, while finer grits are better suited for finishing touches and honing edges to achieve a razor-sharp finish.
Weight: The weight of the diamond stone can impact how easily it is maneuvered during tuning. Heavier stones often provide more stability and contact pressure, which can enhance the sharpening effect, while lighter stones may be easier to handle for more delicate tuning tasks.
Which Brands Are Considered the Best for Diamond Stones in Ski Tuning?
The best brands for diamond stones in ski tuning are renowned for their quality and performance.
- DMT (Diamond Machining Technology): DMT is widely recognized for its high-quality diamond stones, offering a range of grits for various tuning needs.
- Holmenkol: Holmenkol provides professional-grade diamond stones that are durable and effective for maintaining the edges of skis and snowboards.
- Swix: Swix is a trusted brand among skiers, known for its reliable diamond stones that cater to both amateur and professional users.
- Toko: Toko specializes in ski tuning tools and their diamond stones are appreciated for their consistent performance and longevity.
- RaceWax: RaceWax offers a variety of diamond stones that are designed for serious skiers looking for optimal edge precision during tuning.
DMT (Diamond Machining Technology): DMT’s diamond stones are manufactured with a unique process that ensures an even distribution of diamond particles, leading to superior sharpening performance. Their stones come in various sizes and grits, making them versatile for different types of ski tuning tasks.
Holmenkol: Known for their attention to detail, Holmenkol’s diamond stones are made with high-quality materials that enhance durability and effectiveness. Their tools are designed to provide a smooth edge finish, which is crucial for improved performance on the slopes.
Swix: Swix is a staple in the ski tuning industry, offering diamond stones that are both reliable and user-friendly. Their products are engineered to provide quick and efficient tuning, allowing skiers to easily maintain their equipment.
Toko: Toko’s diamond stones are celebrated for their ergonomic design and efficiency in edge tuning. The brand focuses on creating tools that combine functionality with ease of use, making them a favorite among both professionals and enthusiasts.
RaceWax: RaceWax’s diamond stones are specifically designed for high-performance tuning, catering to competitive skiers who require precision and accuracy. Their products are known for quick cutting ability and long-lasting performance, ensuring that skiers can rely on them for consistent results.
What Characteristics Set Top Brands Apart from Others?
The characteristics that set top brands apart in the realm of diamond stones for ski tuning include quality, durability, versatility, and user feedback.
- Quality of Material: High-quality diamond stones are made from superior industrial diamonds, which provide a consistent and effective sharpening surface. This quality translates to better performance and longevity, making them a reliable choice for ski tuning enthusiasts.
- Durability: Top brands often use robust manufacturing processes to ensure their diamond stones withstand frequent use without degrading. This durability means they can maintain their effectiveness over time, offering excellent value for money.
- Versatility: The best diamond stones come in various grits, allowing users to choose the right level of abrasiveness for different tuning tasks. This versatility makes them suitable for a range of skis and snowboards, catering to both novice and professional tuners.
- User Feedback: Leading brands often have a strong community and user base that shares experiences and recommendations. Positive reviews and testimonials highlight their effectiveness and reliability, helping new users make informed decisions based on real-world performance.
How Should You Care for Your Diamond Stone?
Proper care for your diamond stone is essential for maintaining its effectiveness and longevity.
- Cleaning: Regularly clean your diamond stone after each use to remove any debris or metal shavings that may accumulate on its surface.
- Storage: Store your diamond stone in a protective case or a designated area to prevent it from getting scratched or damaged when not in use.
- Usage Technique: Use the diamond stone with a consistent and gentle pressure, following the manufacturer’s recommendations to avoid uneven wear.
- Periodic Inspection: Perform regular inspections of the diamond stone for any signs of wear or damage to ensure optimal performance during ski tuning.
- Lubrication: Occasionally apply a light lubricant, such as water or honing oil, to enhance the cutting action and prolong the life of the diamond surface.
Cleaning your diamond stone is crucial as it prevents the build-up of materials that can hinder its performance. Using a soft brush or cloth can effectively remove debris, ensuring that the stone remains in optimal condition.
Proper storage helps to protect your diamond stone from accidental damage and scratches, which can affect its surface and efficiency. Keeping it in a dedicated case or pouch safeguards it from environmental factors and other tools.
Utilizing the diamond stone with a consistent technique is vital to avoid creating uneven surfaces or damaging the stone itself. Following the recommended angles and pressures will enhance the tuning process and prolong the diamond stone’s lifespan.
Periodic inspections are important to catch any wear before it affects performance. Look for any dull patches or chips that could indicate the need for replacement or resurfacing.
Applying lubrication can keep the diamond stone cutting efficiently and reduce friction during use. This practice not only enhances performance but also helps to prevent overheating and potential damage to both the stone and the ski edges.
What Maintenance Tips Ensure Longevity and Effectiveness?
To ensure the longevity and effectiveness of the best diamond stone for ski tuning, consider the following maintenance tips:
- Regular Cleaning: Keeping your diamond stone clean prevents the buildup of debris and metal shavings, which can affect its performance.
- Proper Storage: Storing your diamond stone in a protective case or sleeve helps prevent damage from accidental drops or scratches.
- Avoiding Excessive Pressure: Using too much pressure while tuning can wear down the diamond surface faster, so it’s essential to apply the right amount of pressure.
- Periodic Resurfacing: Over time, diamond stones may lose their effectiveness; periodic resurfacing can restore the cutting surface for optimal performance.
- Using Lubrication: Applying a light lubricant while using the stone can reduce friction, helping to maintain its surface and enhance tuning efficiency.
Regular Cleaning: After each use, it’s important to wipe the diamond stone with a clean cloth or rinse it under water to remove any metal shavings or wax residue. This not only maintains the stone’s effectiveness but also prolongs its life by preventing corrosion or clogging of the diamond particles.
Proper Storage: When not in use, store your diamond stone in a dedicated case or sleeve to avoid scratches and keep it safe from environmental elements. Proper storage helps maintain the integrity of the diamond surface, ensuring it remains sharp and effective for future tuning sessions.
Avoiding Excessive Pressure: Applying too much pressure while using the diamond stone can lead to faster wear and tear. It’s important to use a gentle, consistent pressure to ensure an even surface finish without damaging the diamond particles.
Periodic Resurfacing: Over time, the cutting surface of your diamond stone may become less effective, requiring resurfacing to maintain its performance. Resurfacing can be done through specialized tools or techniques that restore the diamond surface, ensuring that it continues to work efficiently for ski tuning.
Using Lubrication: When tuning skis, applying a light lubricant can help reduce friction between the diamond stone and the ski base. This not only enhances the tuning process but also helps in preventing excessive wear on the stone itself, contributing to its longevity.
What Common Mistakes Should You Avoid When Using a Diamond Stone?
When using a diamond stone for ski tuning, several common mistakes should be avoided to ensure optimal performance and longevity.
- Using the wrong grit size: Selecting a diamond stone with the incorrect grit size can hinder the tuning process. A coarse grit is ideal for major edge repair, while a finer grit is better for polishing and finishing. Using a grit that is too fine at the beginning can prolong the tuning process unnecessarily.
- Neglecting to clean the stone: Failing to clean the diamond stone after each use can lead to the accumulation of metal filings and debris. This buildup can create an uneven surface and reduce the effectiveness of the stone. Regular cleaning ensures consistent performance and extends the life of the tool.
- Applying excessive pressure: Many users mistakenly believe that pressing harder will yield better results. However, applying too much pressure can damage both the diamond stone and the ski edges. A gentle, consistent pressure is more effective for achieving a smooth finish without unnecessary wear.
- Not following a consistent pattern: Tuning without a systematic approach can lead to uneven edges. It’s crucial to maintain a consistent angle and stroke pattern to ensure that the edges receive uniform treatment. This practice helps in achieving better performance on the snow and prolongs the life of the skis.
- Ignoring the manufacturer’s instructions: Each diamond stone may come with specific guidelines for use and maintenance. Disregarding these instructions can lead to improper use and can diminish the effectiveness of the stone. Always refer to the manufacturer’s advice to maximize the performance and durability of the tool.
- Overlooking the need for regular maintenance: Just like skis, diamond stones require maintenance to perform optimally. This includes periodic flattening and checking for wear. Keeping the stone in good condition ensures that it continues to provide effective edge tuning over time.