.404" pitch 7 tooth clutch replaceable center drive rim clutch sprocket.
Good used drum, with new .404 rim installed
Fits Mcculloch: 1-10, 10-10, 2-10, 3-10, 355, 365, 375, 4-10, 5-10, 515, 6-10, 605, 610, 650, 655, 7-10, 700, 8-10, 805, 850, 855, 9-10, PRO MAC 55, PRO MAC 60, SP-70, Tim...