Size - 2mm diamond-coated grinding bit, 13.5mm Pointed type grinder head, high strength, and good coaxiality.Material - Made of carbon steel and the diamond coated grinding head, higher wear resistance, and durable use.Application - Can be used for grinding most hard materials such as iron, platinum, silver, and other metals. Suitable for sharpening, deburring, grinding, and carving.Features - Good grinding tools for precious stone jade carving, mold repairing, cast cleaning, rust polishing, and DIY hobbyists.Note - The 1/8 Inch (3mm) shank bit fits most electronic grinders, engraving machines, hanging mills, etc. Please be careful of flying chips during use!2mm diamond-coated grinding bit, 13.5mm Pointed type grinder head, high strength, and good coaxiality.Made of carbon steel and the diamond coated grinding head, higher wear resistance, and durable use.This grinding drill bit is suitable for quickly cutting, sharpening, deburring, grinding, rust polishing, carving, and repairing.Good grinding tool for the rough grinding surface of materials such as jade, ceramic, glass, wood, marble, and precious stone.The 1/8 Inch (3mm) shank bit fits most electronic grinders, engraving machines, hanging mills, etc.Note - Please be careful of flying chips during use!