Irwin 3016031ZR Jobber Drill Bit 31/64 in Dia 3-1/8 in OAL Spiral Flute 1-Flute 31/64 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.