Black Oxide Drill Bit - 12 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... 1/4" Mill Diameter 0.2500" Diameter 2 3/4" Flute Length 4" Overall Length Black Oxide Coated 118° Point Angle 12 pcs
