DISSTON COMPANY 287766 31/64"x5-7/8" High Speed Steel Combination Drill and tap

Master Mechanic, 31/64" x 5-7/8", 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, Carded.