.top{margin-bottom:30px;}.top li{margin-left:5%;margin-right:5%;margin-top:10px;line-height:120%;list-style-position:outside;}Wolf Tooth Bottom Bracket Tool - BBS4612 12 Notch 46mm. Wolf Tooth bottom bracket sockets are tools for installation and removal of external cup bottom brackets. They are machined here in Minnesota with 7075-T6 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 Shimano bearing preload tool or a 16mm hex for use with Race Face Cinch cranksets Steel inserts for magnetic coupling compatibility with the Pack Wrench