Even tougher than high speed steel bits - last 30 times longer than standard drill bits! Bores stainless, silicon-chrome, chrome-nickel - even armor and plate Includes metal case; U.S.A. Pieces: 29 Sizes: 1/16in. to 1/2in. in 64ths Includes (qty.): 29, Bores: Stainless, silicon-chrome, chrome-nickel, armor and plate, Case Included: Yes, Size: 1/16in to 1/2in in 64ths, Finish Type: Cobalt More details about product (Cobalt) Drill Bits — 1/16in. Dia. to 1/2in. Dia., 29-Pc. Set
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