Black Oxide Drill Bit 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... 5/8" Mill Diameter 0.6250" Diameter 5 3/16" Flute Length 7 1/8" Overall Length Black Oxide Coated 118° Point Angle
