Century Drill And Tool Cobalt Pro Grade Drill Bit 13/32″ Overall Length 5-1/4″Made from M35 steel with 5% cobalt, Centurys 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 pressurewill 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.