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Black Oxide Drill Bit, Jobber Length, .5 x 6-In.

Master Mechanic

Master mechanic, 1/2" x 6", high speed steel black oxide drill bit, jobber length, 3/8" shank, 135 point angle with 4 cutting edges eliminates walking & provides fast penetration, black oxide tempering treatment reduces frictional resistance & improves chip flow, recommended for wood, plastic, wallboard, plywood, soft metals, aluminum, brass & bronze, for occasional use in stainless steel & other hard metals.