One end wrench engages 16 notches of bottom bracket cups. Disassemble and install Shimano® Hollowtech II, Truvativ® GXP, FSA® MegaExo, Campagnolo® Ultra-Torque, TOKEN® and many other external bearing crank set bottom brackets Spec: TB-BB10, a crank installation tool TB-8911 and adaptor TB-BB18 for Shimano® SM-BB9000, SM-BB93 & TOKEN® adaptor TB-BB19 for Shimano® SM-BBR60.One end wrench engages 16 notches of bottom bracket cups. Disassemble and install Shimano® Hollowtech II, Truvativ® GXP, FSA® MegaExo, Campagnolo® Ultra-Torque, TOKEN® and many other external bearing crank set bottom brackets Spec: TB-BB10, a crank installation tool TB-8911 and adaptor TB-BB18 for Shimano® SM-BB9000, SM-BB93 & TOKEN® adaptor TB-BB19 for Shimano® SM-BBR60.