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DMT DuoSharp Plus 8-inch Sharpening Stone, Dual-Sided: Coarse/Fine (325/600), with Base

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Innovative, precision flat two grit diamond sharpener features both interrupted and continuous diamond sharpening

8" DuoSharp®plus™ Bench Stone with base provides excellent counter and bench sharpening. The stone features two sides of 6" x 2 5/8" interrupted diamond surface sharpening. Perfect for knives, scissors, tools PLUS the benefits of a continuous zone for small and pointed tools. This model comes with the Bench Stone Base Accessory!

A note from Paul: you're probably wondering why this one is cheaper than the regular Duo-Sharp, which does not come with the base, and which has only the polka-dot pattern surface. DMT explained to me that it's more expensive to make the interrupted (polka-dot) surface. Also, while it can be handy to have that little continuous surface (for smaller knives and tips), remember that this also makes it a little more cumbersome to use the full surface of the stone in smooth sharpening sweeps since you'll move from the interrupted to the continuous surface. But still, this is a great value in a very versatile and lightweight stone (AND it includes the base which sells for $24.95 on its own!)

Grit Descriptions:

  • Coarse diamond stone (45 micron / 325 mesh) to quickly restore a neglected edge.
  • Fine diamond stone (25 micron / 600 mesh) for a razor sharp edge.


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. Made in USA.

  • Double-sided stone is economical and space-efficient
  • Excellent for sharpening a variety of knives and edges plus a continuous diamond zone for small and pointed tools
  • Sharpens knives faster than conventional stones with DMT®'s monocrystalline diamond surface
  • No oil is needed-sharpen dry or with water
  • Durable construction will provide years of consistent performance and reliable service

Note that DMT does NOT recommend these stones for lapping/flattening waterstone. Get one of the big DiaFlat lapping plates (extra-coarse or coarse) for that job, they will hold up MUCH better!

Customer Reviews

Based on 1 review
Gave Myself an Edge Up

As a retired cabinet maker, chief cook in our house and an amateur knife maker, I really appreciate cutting tools that have a good edge. I used to use oil stones and water stones and they still have their place, but for ease of use nothing is like a diamond hone. No honing oils or pre soaking the stones in water, diamond stones just need a splash of water and away you go. When I am finished, a quick wipe with a rag to remove the swarf and the stones are ready for the next use.

The 600 grit is ideal for a good working edge on all knives and the 325 grit is perfect for restoring the edge after prolonged use. I use them with my chisels as well, the 325 to establish the bevel and the 600 for the micro bevel. I will say that for paring chisels 600 isn't fine enough, but for those with a steeper bevel, 600 is just fine.

The stand works very well. I was skeptical as to whether what I saw in the online image would be ridged enough and not slide around. I needn't have worried.

I am very pleased with this product and recommend it.

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