THIS IS AN ERICKSON SHELL MILL, PART NUMBER 3-60-440-204, DESIGNED FOR CAT 40 TAPER APPLICATIONS. THE TOOL FEATURES A 2.43-INCH PROJECTION AND A TOTAL OVERALL LENGTH OF 6.5 INCHES. IT HAS A BORE OUTER DIAMETER OF 1.25 INCHES AND A BODY DIAMETER OF 2.75 INCHES. THE BLOCK SIZE IS 1/2 INCH.