Super-strLENGTH steel. Spiral portion coated with orange or black P.T.F.E., HW head with precision balanced centre point, 2 precision ground cutting edges (Z2), 2 ground spurs (V2), 2 spiral flutes. Parallel shank with driving flat and LENGTH adjusting screw.
Super-strLENGTH steel. Spiral portion coated with orange or black P.T.F.E., HW head with precision balanced centre point, 2 precision ground cutting edges (Z2), 2 ground spurs (V2), 2 spiral flutes. Parallel shank with driving flat and LENGTH adjusting screw.
Super-strLENGTH steel. Spiral portion coated with orange or black P.T.F.E., HW head with precision balanced centre point. 2 precision ground cutting edges (Z2), 4 spiral flutes. Parallel shank with driving flat and LENGTH adjusting screw.