GRIT 60: No. 60 diamond rotary grinding set, rougher surface that is faster than coarse grit wheels when sanding, polishing, and engraving.</p> MULTI-PURPOSE: The diamond grinding head burr is used on stone, glass, metal, hardwood, tile, ceramic, marble, granite and other hard materials</p> MULTI-FUNCTION: The diamond grinding bits have 10 different grinding bits for abrasive, engraving, cutting, polishing, carving and engraving</p> COMPATIBILITY: Abrasive bits with universal 3mm (1/8) shank suitable for Dremel multi-tool G4007, 1338, G4115 and most rotary tools or straight grinders</p> EXQUISITE PACKING: 20 pieces of premium diamond rotary burrs are carefully packed in a nice bag as shown, easy to place and carry</p> </p> </ p> Tool - Rotary Tool Accessories - Grinding Tool - 20 Piece Diamond Burr Set for DIY Creations and Craft Projects The diamond point set.</p> Different shapes: such as sphere, cone, cylinder, round head cylinder, ball, flat plate, etc.</p> Universal Compatibility: 3mm diamond rotary bits suitable for most rotary tools and mini grinders and mini drills. .</p> Great gift for DIY lovers: high working efficiency, perfect polishing effect. Convenient to engrave, easy to use, safe and reliable.</p> NOTE: Please add water for cooling when using diamond drill bit.</p> Specification:</p> Material: Steel shank and diamond head</p> Grit: 60#</p> Shank diameter: approx. 3mm</p> Shaft length: approx. 32.9-41.2mm</p> Total length: approx. 45mm</p> Net weight: 70g</p> Package contents:</p> 20 × Diamond ground burs</p> 1 × Bag</p> < p>1 × User manual</p>