PILOT COUNTERBORE ENDMILL CUTTER SOCKET CAP SCREW VARIOUS SIZES AND SETS

21PC COUNTERBORE SET. Designed to create a recess for socket cap screws. COUNTERBORES 8.5MM, 9.5MM, 10.5MM, 11.5MM, 13.5MM, 16.5MM. PILOTS 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8.5, 9, 9.5, 10, 10.5MM.

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