Cobalt drills 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. 12X Life rating compared to the average 118 degree point high speed steel drill.
