THIS ITEM IS A PRECISION COMPONENTS CAT 40 – CHX-03 CUTTER HEAD EXTENSION. THE HOLDER TYPE IS CAT 40, WITH A MODEL NUMBER CAT-40-CHX-03. THE OVERALL LENGTH (OAL) IS 6.375” WITHOUT THE BUTTON. IT FEATURES A BORE DIAMETER OF 1.25” AND A BODY DIAMETER OF 1.89”. THE PROJECTION LENGTH IS 3.625”.