Irwin 63109 Cobalt High Speed Steel Fractional Straight Shank Jobber Length Drill Bit, 9/64 in

Irwin cobalt HSS jobber drill bit at 15/64 inch. Cobalt construction extends bit life on stainless and hardened steel vs standard HSS. Used in mechanical assembly drilling work.

Cobalt High Speed Steel Fractional Straight Shank Jobber Length Drill Bit, 31/64 in

Irwin cobalt HSS jobber drill bit at 1/2 inch. Cobalt construction extends bit life on stainless and hardened steel vs standard HSS. Used in mechanical assembly drilling work.

Irwin cobalt HSS jobber drill bit at 3/8 inch. Cobalt construction extends bit life on stainless and hardened steel vs standard HSS. Used in mechanical assembly drilling work.

Irwin cobalt HSS jobber drill bit at 1/4 inch. Cobalt construction extends bit life on stainless and hardened steel vs standard HSS. Used in mechanical assembly drilling work.