Heavy Duty 3.2mm Swivel blades. For fast and easy removal of burrs from Straight edge, Curved edge, Holes, Cross holes and Deep holes. A comprehensive program to cover all your heavy duty deburring needs. Choose the right blade for your workpiece material and dimensions.Some blades are available for right hand or left hand operation, and some are for both. Some blades are made of M35 Super H.S.S. or Tungsten Carbide and certain blades can be obtained Tin-coated for longer tool life.