#1 Unibit Self-Starting Stairstep Bit, 13-Step, 1/8" to 1/2" Dia., 1/8" Depth by IRWIN
- Stairstep design.
- SpeedPoint tip.
- Patented single-flute edge.
- Hex-shaped shank.
- For use on stainless steel, copper, brass, aluminum, plastic and laminates.
Drill a range of holes without changing bits when you equip with a stairstep bit. SpeedPoint tip penetrates quickly and cleanly without the walking issues common among alternative point designs. Patented single-flute edge provides precise depth control though all size steps. Hex-shaped shank enables secure, slip-free lock-down. Self-starting bit may be used on stainless steel, copper, brass, aluminum, plastic, laminates and wood.
Includes one conical stairstep bit.