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.