Irwin 3016032 Jobber Drill Bit 1/2 in Dia 3-1/4 in OAL Spiral Flute 1-Flute 1/2 in Dia Shank Reduced Shank

5% cobalt and heavy-duty web construction for higher heat and abrasion resistance, strength and durability. Split point begins drilling immediately, minimizing bit walk in applications such as heavy-duty abrasive alloy metal drilling on hardened steel. Jobber length.