Model # 10232
Irwin 10232 - 3/16" - 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. Model G4959 can be used on materials to 3/8" thick.
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