Drill America DWDCO40P1240 Cobalt Drill Bit ,Pack of 12, DWDCO 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, Ideal for drilling in tough, high tensile strength materials.