Lazer Spade bits bore perfectly defined holes with less pressure in a variety of woods. Raker spurs form a high speed cutting wedge that bores faster, smoother finished holes (5/8" and above only). Flat ground cutting zone is easily re-sharpened with a common flat file for longer useful tool life and greater economy. Heavy duty, single construction shank provides added stability; eliminates wobble. Oxide coated to resist corrosion.