Features: HSS with 5% cobalt, durable, higher heat resistance and wear resistance, high-speed steel with cobalt is harder, suitable for drilling high hardness materials Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks, must be used and operated at proper rpms for maximum efficiency 135 Degree split point tip & twist design, increases cutting speed with self-centering and prevents walking, clears chips and particles faster M35 cobalt hss is more suitable for hardened material, particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy
