Irwin 63128 63128 - DRL 7/16 COB JL 135' BULK

63128. Cobalt High Speed Steel Fractional Straight Shank Jobber Length Drill Bit - 7/16". 3016 Series. Constructed of M-35 5 percent cobalt high speed steel for super abrasive resistance in tough metals. Heavy duty spiral flute design produces faster chip ejection. Shorter cutting lips reduce torque for drilling in high tensile strength materials. 135-degree split point reduces feed pressure for easier penetration without work hardening. Applications: Tough metal drilling, including heavy-duty abrasive alloy metal drilling on hardened steel (heat-treated). Size: 7/16".