Black Oxide Drill Bit - 3 pcs The HSS Tool Material provides good wear resistance in mild steels, soft metals (aluminum, copper,brass, bronze) and non-ferrous materials. The Black Oxide Coating helps retain lubricants to aid in wear resistance and chip flow. Features include... 7/16" Mill Diameter 0.4375" Diameter 4 1/16" Flute Length 5 1/2" Overall Length Black Oxide Coated 118° Point Angle 3 pcs
