Master Mechanic, 11/64" x 3-1/4", 4341, 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. Carded.