THIS ITEM IS A COLLIS END MILL HOLDER, PART NUMBER 50VF 3MT, FEATURING A CAT 50 HOLDER TYPE. THE OVERALL LENGTH (OAL) MEASURES 6.5 INCHES. IT HAS A BORE DIAMETER OF 0.94 INCHES AND A BODY DIAMETER OF 2.74 INCHES. THE PROJECTION OF THE HOLDER IS 2.5 INCHES.