Irwin 63524ZR Heavy Duty Black Oxide HSS Jobber Drill Bit 3/8 In

Irwin heavy duty black oxide HSS jobber drill bit at 1/8 inch. Black oxide coating extends bit life over uncoated HSS. Heavy duty construction supports demanding drilling applications.

Irwin heavy duty black oxide HSS jobber drill bit at 1/4 inch. Black oxide coating extends bit life over uncoated HSS. Heavy duty construction supports demanding drilling applications.

Irwin heavy duty black oxide HSS jobber drill bit at 5/32 inch. Black oxide coating extends bit life over uncoated HSS. Heavy duty construction supports demanding drilling applications.

Irwin heavy duty black oxide HSS jobber drill bit at 13/64 inch. Black oxide coating extends bit life over uncoated HSS. Heavy duty construction supports demanding drilling applications.

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.