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21/64" x 4-5/8" M42 Gold Cobalt Jobber Drill Bit
21/64" x 4-5/8" M42 Cobalt Jobber Drill Bit with a 3-5/16" depth of cut. M42 premium cobalt 135 degree split point with grounded flats on shank. This premium cobalt drill bit is unmatched among its competitors in hard materials.