Irwin 49615 Drill Bit 5/16 in Dia 4-19/32 in OAL Spiral Flute 2-Flute 5/16 in Dia Shank Reduced Shank

Chrome vanadium steel heat treated at full length for extra sharpness and long life in woodworking applications. The spurred cutting head reduces splintering and ensures a smooth clean hole, wide flutes provide a fast continuous flow of chips.