Milwaukee Spline Bit 2-Cutter 3/4" x 22" Model Number: 48-20-4037 Two Cutter Spline Bits have a series of 12 spline that slide into an equal but opposite set of Spline in the drive system of the Spline Drive Hammer. This positive engagement of Spline to Spline allows maximum transmission of energy from the Hammer to the Bit.
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