Designed for drilling in extremely hard materials including stainless steel. Cobalt drill bits have a great resistance to heat and friction providing a longer tool life. Century 135 degree quick-cut points are self-centering and penetrate faster with less pressure. Cobalt drill bits offer 14 times Life Rating when compared to standard 118 Degree point drill bits.
Great drill bits! I drilled out a car screw. Imported drills quickly became dull and would not move. I switched to them and they went through like a hot knife through butter. Very impressive.
Pros
Century 135 degree HSS tips self-center and penetrate faster with less pressure