- Single-flute cutting edge for greater control through steps
- 3 flatted shank prevents slipping in drill chuck
- Also available with titanium nitride coating for longer life
- Patented single-flute cutting edge gives the user a true round hole every time
- Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
- Pilot hole required
![Irwin® High Speed Steel Fractional Hole Enlarging, 9/16"-1 in, 8 Steps #IR-10220 (1/Pkg) Irwin® High Speed Steel Fractional Hole Enlarging, 9/16"-1 in, 8 Steps #IR-10220 (1/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/259722/364598/585-10220__67232.1595468736.jpg?c=2)