- 1/4-inch round shank fits all handheld and stationary drills
- Five-flute design reduces vibration for smoother drilling and extended life
- Made from industrial grade High-Speed Steel for increased durability. Black oxide finish resists corrosion
- Precision ground 82-degree tip for countersinking most machinable metals, wood or plastic
![Irwin® Aircraft Extension Fractional Straight Shank Drill Bits, 3/16", 12" L, Pouched, #IR-62112ZR (3/Pkg) Irwin® Aircraft Extension Fractional Straight Shank Drill Bits, 3/16", 12" L, Pouched, #IR-62112ZR (3/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/260509/449494/62112ZR__64264.1669737823.jpg?c=2)