DISSTON COMPANY 287653 21/64"x4-5/8" High Speed Steel Combination Drill and tap

Master Mechanic, 21/64" x 4-5/8", high speed steel BLACK oxide drill bit, jobber length, straight 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.