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DMT Sharp

(6 products)

DMT Diamond Sharpening Stones, Bench Stones & Lapping Plates

DMT (Diamond Machining Technology) sharpeners use industrial-grade monocrystalline diamonds bonded directly to a steel substrate. Unlike oil stones or waterstones, DMT stones never dish, so every stroke removes metal consistently from the first pass to the last. Whether you need a quick touch-up in the shop or a full re-grind from scratch, DMT offers the right grit and format.

Formats for Every Sharpening Task

The DMT 10" Dual Grit Diamond Sharpening Stones combine two grits in one bench stone for fast progression, while the DMT DuoSharp DuoBase holder keeps the stone stable on any bench. For pocket or job-site use, the DMT Diafold Dual Grit compact sharpener folds flat and slips into an apron pocket. The credit-card-sized DMT DiaSharp Credit Card Sharpener is ideal for touching up chisels between cuts.

Diamond Paste & Flat Lapping

When mirror-polished edges are the goal, the DMT 3 Pc Diamond Paste Kit (6/3/1 micron) delivers a progression from honing to stropping on any flat substrate. The DMT 95-Micron 10"×4" DIA-FLAT Flattening Plate quickly resurfaces waterstone faces or flattens chisels and plane irons in one step. All DMT products are backed by our quality guarantee.

  • Monocrystalline diamonds – sharper and longer-lasting than polycrystalline alternatives
  • No dishing – consistent geometry over the life of the stone
  • Available in coarse, fine, and extra-fine grits
  • Works dry or with water – no oil needed

Frequently Asked Questions

What makes DMT diamond stones different from waterstones?

DMT stones use monocrystalline diamonds bonded to a rigid steel substrate, so they never dish or need flattening. Waterstones are softer and must be periodically trued on a flattening plate to maintain accuracy.

Do DMT diamond sharpeners need oil or water?

DMT stones can be used dry or with a small amount of water to float away swarf. No oil is required, which makes cleanup fast and keeps the stone from clogging.

Which DMT grit should I start with for a dull chisel?

Start with a coarse grit to re-establish the bevel quickly, then move to fine and extra-fine for the polished edge. The DMT 10" Dual Grit bench stone combines two grits so you can progress without switching tools.

Can DMT diamond stones sharpen carbide router bits?

Diamond abrasives are one of the few materials hard enough to sharpen carbide. DMT stones can touch up carbide edges, though heavily worn carbide bits may need professional grinding.

What is the DMT DIA-FLAT flattening plate used for?

The DMT 95-Micron DIA-FLAT plate is designed to resurface the face of waterstones and oil stones, restoring flatness quickly. It can also be used to flatten the backs of plane irons and wide chisels.

What does the DMT Diamond Paste Kit include?

The DMT 3 Pc Diamond Paste Kit includes three syringes of diamond paste in 6, 3, and 1 micron grits, allowing a complete honing and polishing progression on any flat surface such as glass or MDF.

Is the DMT Diafold compact sharpener good for carving tools?

Yes. The DMT Diafold folds to a protective case and opens to a flat sharpening surface, making it convenient for touching up carving gouges and pocket knives at the bench or in the field.

Does Infinity Tools offer a quality guarantee on DMT products?

Yes. All DMT sharpeners sold through Infinity Tools are covered by our quality guarantee. Contact us if you have any concerns about a product you receive.

What shipping options are available for DMT sharpeners?

Infinity Tools ships DMT products across the US. Visit our shipping policies page for current rates, delivery estimates, and free shipping thresholds.

Where can I learn more about sharpening techniques for woodworking tools?

The Infinity Tools learning blog covers sharpening methods, grit selection, and tool maintenance tips to help you get the most from your DMT stones and paste kits.