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Snappy Flat Bottom Counterbore Countersink 5/16in. Drill Bit x 3/4 Bore USA Made 5/16 Drill x 3/4 CntBore

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Snappy Flat Bottom Counterbore Countersink 5/16in. Drill Bit x 3/4 Bore USA Made

Use SD-3 Counterbores to drill a pilot hole and counterbore a flat bottomed hole in one step. Perfect for lag screws, lag bolts, washer head screws, T-nuts & more.

Product Features

  • Drive Shank: 1/4" Hex Power Bit Shank
  • Drill Size: 5/16"
  • Counterbore Size: 3/4"