1-1/2 in. M42 Cobalt Reduced Shank Drill Bit with 1/2 in. Shank

Drill America D/ACO Cobalt Reduced Shank Drill Bit. D/ACO cobalt drill bits are made of heat resistant m42 cobalt. They are ground to a heavy-duty 135° split point. They are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys.