PACK Bottom Bracket tools Product #901855 Large finger notches so you can start threading the cups by hand 3/8'' square socket or 1'' for ratchet/torque wrench Each socket has 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 BBS3916: 16 notch for 39mm diameter notch pattern, XTR/Dura Ace BBS4116: 16 notch for 41mm diameter notch pattern, Ultegra BBR60 BBS4416: 16 notch for 44mm diameter notch pattern, Hollowtech II, Campagnolo, Chris King, FSA MegaExo, Hope, SRAM/Truvativ GXP, Race Face X-type, Surly, Wheels, and others BBS4612: 12 notch for 46mm diameter notch pattern, Race Face 30mm Spindle, TF47, SRAM DUB, RaceFace Cinch, Zipp Vuma, Rotor BSA30, Hawk Racing BB3086 BBS4816: 16 notch for 48mm diameter notch pattern, FSA 386 MegaEvo, Wheels® PF30
