- Single-flute cutting edge for greater control through steps
- Hex shank prevents slipping in drill chuck
- Also available with (TiN) coating for longer life
- New SpeedPoint tip penetrates faster than previous Unibits and prevents walking
- Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
![Irwin® High Speed Steel Fractional Self-Starting, 1 1/8", 1 Step, #IR-10313ZR (1/Pkg) Irwin® High Speed Steel Fractional Self-Starting, 1 1/8", 1 Step, #IR-10313ZR (1/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/256250/361187/585-10313__73358.1595397856.jpg?c=2)
IRWIN Tools
Irwin® High Speed Steel Fractional Self-Starting, 1 1/8", 1 Step, #IR-10313ZR (1/Pkg)
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