Material: Tungsten Carbide, Shank diameter: 3 mm(1/8 inch), Cutting edge diameter: 6 mm(1/4 inch), Total length: 45-50 mm(1.77-2 inch).Please check the size before you buy it. LONG WORKING LIFE: Lasts long working life, packed with nice plastic case for safety storage and protection. High efficiency, high-quality finish, long service life, good economic returns. HIGH PRODUCTIVITY: Processing efficiency than the manual file to improve of times, than with a small handle wheel to improve nearly ten times. DOUBLE DESIGN: Double groove because the lines are crossed, more suitable for the object density is relatively low. For example: Carbide burr straight used in the wooden. Plastic. Aluminum material on! With cross-grain chip quickly, in the grinding and carving time. SUITABLE FOR MOST TOOLS: 10 pieces Double Cut Solid Carbide Rotary Burr Set carbide burr set, fits most small rotary tools,Woodworking Drilling Carving Engraving, making DIY carving fans much easier to do the wood working job.