The first and last name in bicycle tools is Park so if you've got a 16-notch external bottom bracket which needs installation or removal then the BBT-19.2 Bottom Bracket Tool is the perfect choice. As with its brethren in the Park Tool line-up, it's precision built and will last a lifetime. Designed to install and remove 16-notch external bearing bottom bracket cups Compatible with Shimano Hollowtech II, TruVativ GXP, Race Face X-Type, SRAM Force and Rival, FSA MegaExo, Campagnolo Ultra Torque bottom brackets Can be used with a 3/8" drive torque wrench, 3/8" ratchet driver, FRW-1 Freewheel Remover Wrench or a 1" wrench Investment cast steel construction provides durable strength