Highspeed steel with M35, 5 cobalt, for higher heat and abrasion resistance heavyduty web construction for strength and durability Split point begins drilling immediately, minimizing bit walk when used in applications such as metal drilling, including heavyduty abrasive alloy metal drilling on hardened steel heattreated.

IRWIN 5/16 COBALT DRILL BIT

HANSON 63121 Cobalt High Speed Steel Fractional Straight Shank Jobber Length.

IRWIN 23/64 COBALT DRILL BIT

IRWIN 3/8 COBALT DRILL BIT

IRWIN 27/64 COBALT DRILL BIT