Irwin 316015 Cobalt Alloy Steel Set 15 Piece Set

15 Piece, Cobalt Alloy Steel Pro Drill Bit Set, 1/16-in through 3/8-in, 135 degree split point to minimize walk. 8% Cobalt Alloy Steel for higher heat and abrasion resistance. Heavy duty web construction for strength and durability. For tough metal drilling, including heavy duty abrasive, alloy metal drilling on hardened steel, cast iron and stainless steel. Rugged storage case with rubber over mold for added impact resistance and sliding latch design provides added security.