KYOCERA OTM86437 SHCS-CB Interchangeable Pilot Weldon Flat Shank Indexable Counterbore, 11.18 mm Dia Bore, M6 Socket Head Cap Screw, 3/4 in Dia Shank, 11.18 mm Dia Min Cutting, 0.54 in Max Counterbore Depth, TCMT 18151 Insert, 1 Inserts