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Unibit Bits are constructed of industrial-grade high speed molybdenum steel. For use with steel, copper, brass, aluminum and other thin materials. Exclusive design allows the drilling of perfectly round holes in these materials.
Includes 10231 (13 holes, 1/8"-1/2"), 10232 (6 holes, 3/16"-1/2") & 10233 (9 holes, 1/4"-3/4").