Chamfer Tool External 6 - 20mm 1/4' Shank Hex Product material: Steel body Black - Iodized Cutting edges: 5 1/4' Hex Create a perfect chamfer for: - Starting a nut on a bolt or threaded bar. - Starting a button die or a die nut on a rod. - Creating a leading edge on a timber dowel. The chamfer tool efficiently removes burrs and ridges from bolts, pipe, threaded rods and dowels. It is suitable for use on metals including mild and hardened steels, stainless steel, copper and brass, as well as timber, fiberglass and plastics. Use at low speed - Maximum 800 RPM. Use in impact drivers will reduce tool life.