ZFE 10 Pieces Tungsten Carbide Rotary Burr SET 1/8" Shank/double Cut Carbide Rotary Burr Set with 3mm Shank/tungsten Carbide Single Cut Rotary Burr SET 1/8" Shank Fit Dremel Material: Tungsten Carbide Use: Rotary Burr Shank diameter: 3mm, Shank Length: 35mm Cutting edge diameter: 6 mm Total length: 45-50 mm