# 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. Key Specs Includes (qty.) 21 Bores Stainless, silicon-chrome, chrome-nickel, armor and plate Case Included Yes Size 1/16in. - 1/2in. by 64ths Finish Type Cobalt
