- Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
- Single-flute cutting edge for greater control through steps
- 3 flatted shank prevents slipping in drill chuck
- New SpeedPoint tip penetrates faster than previous Unibits and prevents walking
![Irwin High Speed Steel Fractional Self-Starting, 1/8"-1/2", 13 Steps #IR-10231 (1/Pkg) Irwin High Speed Steel Fractional Self-Starting, 1/8"-1/2", 13 Steps #IR-10231 (1/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/260564/450170/Untitled_design_-_2022-12-01T150457.886__74558.1669928709.jpg?c=2)