Amabur A603 10-pieces Best Double Cut Tungsten Carbide Rotary Burr Set 1/8 Inch Shank for Dremel,Genesis,WEN Rotary Tool Rotary burr: the shank 1/8 Inch Rotary burr set :Cutting edge diameter: 1/8 inch (3mm) Carbide rotary file Suitable material: wood, plastic, soft metal as aluminum... amabur carbide rotary burr Industrial levels - high quality material, not easy to damage