Item #: G4958
Model # 10231
Irwin 10231 - 1/8" - 1/2" Unibit
The single drill bit that does it all! Forged in industrial grade molybdenum steel and heat treated to a 61-63 hardness on the Rockwell scale, these self-starting, laser-marked step bits provide clean and dependable drilling in steel, copper, brass, aluminum, and other sheet stock materials to 1/8" thick.Made in USA.
Free shipping within the Contiguous United States.