High speed steel construction means fast and smooth countersinking holes and chamfering edges with this countersink bit from Task Tools. with quick and precise action, the bit blazes through a variety of materials, including steel, iron, non-ferrous metals , wood and plastics. A 5-flute design ensures silky-smooth, chatter-free cuts and longer tool life. Chamfer angle: 82 Degrees. Diameter: 3/4-Inch.