For creating SAE double flare E and SAE double flare F. 1x Pressure piece with one side OP 1 3/16" (4.75 mm) for SAE double flare F, second side OP2 with 3/16" (4.75 mm) for SAE double flare E. Countersink Drill Bit Set 5PCS 1/4"(6.35mm) HEX Shank Woodworking Cutter.
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