Black Oxide Drill Bits, 135 Split Point, 5/32 X 3-1/8 In.

Description

Master mechanic, 5/32″ x 3-1/8″, high speed steel, black oxide drill bit, 135 split point, jobber length, straight shank, 135 point angle with 4 cutting edges which eliminate walking & provide 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.