Drill America - D/ACO3/4 3/4" Reduced Shank Cobalt Drill Bit with 1/2" Shank, D/ACO 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, Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools, Round shanks allow use with a wide variety of toolholding systems, When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging, Manufactured to National Aerospace standard 907.