29Pcs M35(H.S.S.+5% Cobalt) Professional Jobber Length Drill Set 135° Split Point
135° split point for fast penetration and accurate starting with no punch.
Retains hardness at high temperatures.
Lasts 12x longer than standard 118° point drill bits
With aggressive, these cobalt drills bits not only last longer while drilling but also cut faster than standard high-speed steel bits. It's ideal for drilling cast iron, heat-treated steel, stainless steel and other hard materials.