MICROMOT-accessories for rotary tools Diamond coated bits (all measurements in inch), Diamond grinding bits, With consistently even coating of diamond dust, For fine detail work, grinding, finishing and engraving hard materials: steel (even chrome-cobalt alloy), glass, stones, ceramics, porcelain, plastics, All shanks 3/32"" (2,35 mm) made from stainless steel, SKU: PXTECH005