THIS IS A BALAS 30MM-VF-2J TOOL HOLDER DESIGNED WITH A CAT 30 TAPER TYPE. THE OVERALL LENGTH (OAL) MEASURES 4.21 INCHES, WITH A PROJECTION OF 2.25 INCHES. THE BODY DIAMETER IS 1.24 INCHES. THE TOOL HOLDER FEATURES A BORE WITH AN OUTER DIAMETER (BORE OD) OF 0.50 INCHES AND AN INNER DIAMETER (BORE ID) OF 2MM.