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Model # D8C

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8 in. Dia-Sharp Bench Stone Coarse

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  • Diamond top works dry or with water, reducing oil requirement
  • Hard-wearing surface provides consistent and efficient sharpening
  • Non-skid rubber feet prevent against accidental sliding
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Product Details

Guaranteed not to hollow or groove, DMTs precisely engineered Dia-Sharp Bench Stone with continuous diamond surface assures consistent, even sharpening every time. The 8 in. L is great for both long and short knives providing cutting edge performance for a quick, keen edge on small contact areas and pointed tools. Coarse diamond (45 micron / 325 mesh) to quickly restore a neglected edge. Includes non-skid rubber feet. Diamond grit clearly marked on side of stone. Sharpening with diamonds is fast and easy. No messy oils needed sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service. For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT products.
  • Sharpening surface accommodates range of edges from large knives to small pointed tools
  • Coarse diamond to transform a dull edge
  • Sharpens knives faster than conventional stones with DMT's micronized monocrystalline diamond surface
  • No oil is needed-sharpen dry or with water
  • Durable construction will provide years of performance and reliable service
  • No power necessary, sharpen anywhere, anytime
  • Designed with diamond, the hardest known material, so that you can sharpen any steel, tungsten, ceramic, or other hard materials and much faster than with conventional abrasives
  • Enjoy faster sharpening
  • Return Policy
  • California residents



Product Depth (in.)8 inProduct Length (in.)0.38 in
Product Width (in.)3 in


FeaturesNo Additional FeaturesHand Tool TypeSharpener
Individual/SetIndividualKnife Sharpener MaterialDiamond
Number of Pieces1Product Weight (lb.)2.45 lb
Returnable90-DaySharpening Tool Product TypeHandheld Sharpeners
Tools Product TypeHand Tool

Warranty / Certifications

Manufacturer WarrantyLifetime Warranty

Questions & Answers

Q:What is the difference between a coarse stone and a fine stone?
by|Mar 14, 2023
1 Answer
Answer This Question

A:  The amount of material that gets removed per pass.  Course will remove more material but not leave a smooth surface.  Fine will remove less material but leave a smooth surface which allows a sharper cutting edge 

by|Mar 15, 2023
    Q:Why is this labeled under ACME United?
    by|Jul 5, 2019
    1 Answer
    Answer This Question

    A:  DMT - Diamond Machining Technology produces the products you have purchased. We are listed under Acme United Corporation as we were purchased by them in 2016. We are still made in Massachusetts.

    by|Jul 10, 2019
      Showing 1-2 of 2

      Customer Reviews

      4.6 out of 5
      • 4.6
        out of 18 reviews
      • 83% recommend this product
      Filter by:
      Showing 1-10 of 18 reviews
      Outstanding Sharpening Tool
      These Dia-Sharp sharpeners are outstanding. Each weighs a couple pounds and they are completely dead flat for perfect sharpening. I use a lot of hand tools with my woodworking—planes, spokeshaves, chisels, and the like. I’ve been using oil stones like Arkansas and Norton stones for years. Those are effective, but they quickly develop pits, and take a decent amount of work to get a good edge. I’ve been hearing about DMT sharpeners for a while, and finally went ahead to see if they live up to the hype. They do. I acquired one each of the coarse, fine, and extra fine. These do an amazing job sharpening tools, quickly putting an edge on a dulled tool. They have a great “feel” to them as well—it’s pretty easy to tell just by the feel if a tool is sharpened. They only require a little bit of water to lubricate, and clean up quickly and easily with a shop towel. Though they are quite good and heavy, I find that putting a bit of shelf liner underneath is still necessary to keep it from sliding around on my workbench. I can’t recommend these highly enough if you have need to regularly sharpen any metal hand tools.
      • Recommended
      Great sharpening stone.
      My husband has always wanted one of these sharpening stones. When I gave it to him, he was like a kid at Christmas opening it. He couldn't wait to try it. He was amazed at how few strokes it took for him to sharpen his tools. These stones are guaranteed not to hollow or groove, they are great for both long and short knives and pointed tools. They have little rubber feet on the bottom to hold it in place when in use. You don't need to use oils on the stone....you can use them dry or with water. You can sharpen any steel, tungsten, ceramic, or other hard materials with these stones. You will not be disappointed with this product.
      • Recommended
      Good 1st step in sharpening
      This single-sided, coarse grit diamond stone sharpener is a good size for sharpening a variety of tools. Chisels, knives, and plane blades are a few of the uses. The coarse grit will clean up a badly damaged edge quickly. It is wide enough for most tools. Water sprayed on the diamond stone will aid in lubricating the stone and the tool. The swarf will show progress in removing metal and will wipe off with a rag or paper towel. Oil is NOT required or recommended on these stones. This stone will store away easily in a cabinet or drawer waiting for the next sharpening job. DMT also sells other stones with different levels of grit based on your needs. DMT diamond stones have a better surface than other brands - according to the package description. The metal stones will not warp or dish out like softer water stones. DMT also sells sharpening guide holders to get a consistent angle. I would recommend this stone as the 1st step in your sharpening process with finer grits up to the level of sharpness that your tool needs.
      • Recommended
      DMT 8 in. Dia-Sharp Bench Stone Coarse
      Wow, No oil is needed to sharpen and you can sharpen dry or with water. This bench stone is huge & really has some heft to it. You will not have it moving around when you are putting an edge on anything. The Coarse diamond to transforms a dull edge effortless. You do not need to press hard to get this stone to cut. just a few swipes with a knife and you have an edge you can finish with a steel. This is the best quality diamond stone i have ever used. The way this is built it should last for years. Putting an edge on my lathe tools is very fast and easy. You really do get what you pay for with this Bench Stone.
      • Recommended
      This is a coarse stone that takes a dull knife to very sharp with just a few strokes. I use it to...
      This is a coarse stone that takes a dull knife to very sharp with just a few strokes. I use it to remove chips and re-profile some of my knife blades. With this order I also got some fine and extra fine stones that really put that final edge on all my knives.
      • Verified Purchase
      • Recommended
        • Verified Purchase
        Worked as expected 325 grit cuts metal quickly....
        Worked as expected 325 grit cuts metal quickly.
        • Verified Purchase
        • Verified Purchase
        Great product,good price,great delivery ....
        Great product,good price,great delivery .
        • Verified Purchase
        Showing 1-10 of 18 reviews

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