Cobalt Drill Bits (Pack of 12) for Drill America DWDCO Series 40 - Simplified title for audience: Drill America DWDCO Series 40: Cobalt Drill Bits (Pack of 12)
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