KYOCERA OTM86016 SHCS-CB Interchangeable Pilot Weldon Flat Shank Indexable Counterbore, 0.797 in Dia Bore, 1/2 in Socket Head Cap Screw, 3/4 in Dia Shank, 0.797 in Dia Min Cutting, 0.79 in Max Counterbore Depth, TCMT 18151 Insert, 2 Inserts