(Cobalt) Drill Bits Set — 1/16in. Dia. to 1/2in. Dia., 21-Pc. Set

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; * Pieces: 21* Sizes: 1/16 in. to 1/2 in. in 64ths