Drill America 21/64" Quick Change Cobalt Drill Bit with Hex Shank, COHEX Series

Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys 1/4 in. hex shank can be used in quick change impact drivers 135 degree split point tip for self-centering and reducing thrust; Compared to a conventional 118 degree tip, these drills wont go "walking" on you Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools Manufactured to National Aerospace standard 907