Rotary File and Rasp Set Rotary Tool Accessory Type Rotary File Rotary Rasp Bit Material Alloy Steel Shape Cylinder Max Speed 2 500 RPM Shank Diameter 1/4 in Mount Type Mounted Overall Length 2 in Burr Diameter 1/2 in 5/8 in Head Length 2 1/8 in 2 3/8 in Head Width 1/2 in 5/8 in Material Application Bronze Iron Mild Steel Plastic Soft Metal Wood