Check the listing for details. Wolf Tooth BBS4116 16-Notch 41mm Aluminum Bottom Bracket Tool for & SRAM. Condition: New. Listed at 40.85 USD. Wolf Tooth bottom bracket sockets are tools for installation and removal of external cup bottom brackets. They are machined here in Minnesota with aircraft grade aluminum. Large finger notches so you can start threading the cups by hand. 3/8" square socket or 1" hex for ratchet/torque wrench. Most sockets have either a bearing preload tool or a 16mm hex for use with Race Face Cinch cranksets. Steel inserts for magnetic coupling compatibility with the Pack Wrench. . Compatibility . . BBS4116: 16 notch BB socket for 41mm diameter notch pattern, 105, Ultegra BBR60 and 6800, XT MT-800 BBS4416: 16 notch BB socket for 44mm diameter notch pattern, Wolf Tooth BSA 24mm Bottom Bracket, BB80, BB5700, BB70, BB51, Enduro T47, Wheels T47, many from Hollowtech II, Campagnolo,.