THE LYNDEX B4007-1000 IS A CAT 40 TOOL HOLDER WITH AN OVERALL LENGTH (OAL) OF 5.5IN WITHOUT THE BUTTON OR NUT ON THE HOLDER END. IT HAS A PROJECTION OF 2.84IN AND A BODY DIAMETER OF 2.19IN. THE BORE DIAMETER MEASURES 1.37IN, AND THE OUTER BORE DIAMETER IS 1.86IN.