Rotary File, Rotary Tool Accessory Type Rotary File, Bit Material Alloy Steel, Shape Tapered, Max. Speed 2,500 RPM, Shank Diameter 1/4 in, Mount Type Mounted, Overall Length 2 1/8 in, Burr Diameter 1/2 in, Head Length 7/8 in, Head Width 1/2 in, Material Application Bronze, Iron, Mild Steel, Plastic, Soft Metal, Wood