Federal Tool Solid Pilot Counter Bores, Three Flute, Straight Shank

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