Irwin G4961 - 3/16 - 7/8" 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.
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