Cobalt Pro Grade Drill Bit 5/16″ Overall Length 4-1/2″
- Made from M35 steel with 5% cobalt, Century’s Cobalt drill bits are designed to cut through extremely hard metals, including stainless steel
- No center punch needed: Century 135-degree quick-cut points are self-centering and penetrate faster with less pressure…will not “walk” or “wander” at the starting surface
- Extremely heat resistant, must be used and operated in power units that have a RPM speed of 1,500 or more for maximum efficiency
- Made in the U.S.A.