The Park Tool BBT-9 workshop tool is an external bottom bracket tool for Shimano Hollow Tech 2 BBs. It also has the retention cap tool built into its handle. The only other tool you require for removal and fitting of a Shimano Hollow Tech 2 Chainset is a 5mm Allen (hex) key (sold separately).
Features: Install/remove Shimano Hollowtech 2 BB Also fits Campagnolo Ultra Torque BB Cups