THIS IS A KENNAMETAL TOOL HOLDER, MODEL CB1074355. IT IS DESIGNED WITH A CAT40 TAPER SIZE AND A TAPERED SHANK. THE OVERALL LENGTH OF THE HOLDER IS 7.750 INCHES, WITH A PROJECTION OF 5 INCHES. IT FEATURES A BODY DIAMETER OF 3.34 INCHES AND A BORE DIAMETER OF 2.125 INCHES.