Irwin 81121 Jobber Drill Bit, #21, 0.159 in Dia, 3-1/4 in OAL, Spiral Flute, 4-Flute, 0.159 in Dia Shank, Straight Shank

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High-speed M-2 steel bit drills exact size hole for tapping; use where non-fractional sized holes are required in automotive, MRO, portable drill or stationary drill press applications. Jobber length.