The wrench is used to remove and install Shimano® Hollowtech II, Campagnolo® Ultra-Torque and Power Torque, Race Face®, FSA®, SRAM®, Truvativ®, Chris King® bottom brackets as well as many and others.
Small wrench is included for removal and installation of Shimano plastic bolts that are used on the Hollowtech II cranksets.
The 1609/2BI wrench also fits on the external centerlock disc nut.