DMT D8E Dia-Sharp Bench Stone — Extra Fine, Flat Diamond Sharpening — Made in Marlborough, Massachusetts by Diamond Machining Technology (DMT). Monocrystalline diamond surface bonded to a precision-flat steel substrate — sharpens any blade material faster than aluminum oxide stones, with water or dry, no soaking required.
DMT has been manufacturing diamond sharpeners in Marlborough, MA since 1976. Each stone is electroplated with monocrystalline diamond crystals — sharper and more durable than the polycrystalline diamond used by overseas competitors. The flat steel substrate is precision-ground at the DMT facility to maintain a true reference surface for life.
Sharpens knives, chisels, plane irons, axes, scissors, and any other steel edge. Use dry or with water — no oil, no soaking, no flattening. The professional standard among chefs, woodworkers, and outdoorsmen who keep their edges working.






