60 GRIT: #60 diamond rotary grinder, rougher finish that is faster than coarse grit grinding wheels for grinding, polishing and engraving. MULTIPURPOSE: The diamond grinding head can be used on stone, glass, metal, hardwood, tile, ceramic, marble, granite and other hard materials MULTIFUNCTION: Diamond drill bits have 10 different grinding bits for grinding, engraving, cutting, polishing, carving and engraving COMPATIBILITY: Universal grinding bits with 3 mm (1/8 inch) shank, suitable for G4007, 1338, G4115 Dremel multi-tool and most rotary tools or die grinders EXQUISITE PACKAGING: 20 pieces premium diamond burrs are neatly packed in a beautiful bag as shown, easy to place and carry Tools - Rotary Tool Accessories - Grinding Tool - Set of 20 Diamond Bits for DIY Creations and Craft Projects The Diamond Bit Set. Various shapes: such as sphere, cone, cylinder, round head cylinder, sphere, flat plate, etc. Universal Compatibility: 3mm diamond rotary drill, suitable for most rotary tools and mini grinders and mini drills. Great gift for DIY enthusiasts: high work efficiency, perfect grinding effect. Convenient to engrave, easy to use, safe and reliable. NOTE: Please add water to cool when using diamond bur. Specification: Material: steel shaft and diamond head Grit: 60# Stem diameter: Approx. 3mm Stem Length: Approx. 32.9-41.2mm Total length: approx. 45mm Net weight: 70g Content: 20 Diamond Crushed Burrs 1 bag 1 User Manual