Irwin Unibit 10310 Unibit #10 HSS 1-Step Drill Bit (1/2")

These high-speed steel fractional self-starting drill bits have a single-flute cutting edge for greater control through steps. The 3 flatted shank prevents slipping in drill chuck.
These high-speed steel fractional self-starting drill bits have a single-flute cutting edge for greater control through steps. The 3 flatted shank prevents slipping in drill chuck.