DISSTON COMPANY 120139 1/2"x6" High Speed Steel Combination Drill and tap 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, Carded. Features Double reinforced with industrial grit glue for increased life durability Easy to use Manufactured in China USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.