Federal Tool Solid Pilot Counter Bores, Three Flute, Straight Shank
Features:
Features:
- Solid Pilot Counterbores are .001 - .002 undersize for ease of entry
- SET No. 508S7: 7 Piece SS Set Contains 1 piece each: No. 6, No. 10 1/4, 5/16, 3/8, 1/2 Supplied in Wood Block
- SET No. 508S4: 4 Piece SS Set Contains 1 piece each: No. 8, No. 10, 1/4, 3/8 Supplied in Wood Block
1/2" Screw Size, 9/16 x 13/16" Pilot. Solid Pilot Counter Bore
