Irwin #21 Unibit (TiN) Step Drill 13/16 In. to 1-3/8 In. 10 Hole Sizes
This unibit step drill bit is ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. The single-flute cutting edge for greater control through steps.
3 flatted shank prevents slipping in drill chuck
Patented single-flute cutting edge gives the user a true round hole every time
Pilot hole required
Durable