HSS TiN coated Countersink Drill Bits with Spiral Flute (arc groove)

      The improved arc groove is highly compatible with the spiral groove,335C 90°, which greatly improves the working efficiency and prolongs the service life.

      Because of the spiral flutes and arc groove the cutting edges are extremely sharp.  Ideal for burr- and chatter-free deburring and countersinking.  Applicable for steel, cast iron, non-ferrous and light metals.  Best results at low cutting speeds.

      Size:6.3, 8.3, 10.4, 12.4, 16.5, 23, 25, 28, 30, 31, 40mm