The BBT-9 Bottom Bracket tool from Park is used to remove and install Shimano Hollowtech II, Campagnolo Ulta-Torque and many other external bearing crankset bottom brackets.
Features
One end of the tool securely engages the 16 notches of the bottom bracket cups
The other end of the tool engages the 8 internal splines of the crankarm adjustment cap
Also fits rotor disc lock rings with 16 external notches