36428 – 7/16″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill

$ 38.00

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.

  • Drive Shank: 1/4″ Hex Power Bit Shank
  • Drill Size: 7/16″ Ø
  • Counterbore Size: 1″ Ø