THIS COLLIS SHELL END MILL HOLDER, MODEL NO 40 - 1-1/4", IS DESIGNED WITH A CAT40 TAPER AND A DRAW BAR STYLE ADAPTER. IT FEATURES A 2.66-INCH PROJECTION AND AN OVERALL LENGTH (OAL) OF 6-3/8 INCHES. THE HOLDER IS ENGINEERED WITH A 1-1/4 INCH PILOT DIAMETER AND UTILIZES A 5/8"-11 DRAW BAR THREAD.