General description The UNIOR Open Bottom Bracket Wrench is a versatile tool designed for the removal and installation of various bottom brackets, including Shimano® Hollowtech II, Campagnolo® Ultra-Torque and Power Torque, Race Face®, FSA®, SRAM®, Truvativ®, and Chris King® models. Its unique design also allows it to fit disc brake rotor nuts with 16 external notches. Technical specifications Material: Premium Flex Plus Carbon Steel Surface Finish: Chrome Plated ISO Compliance: ISO 1456:2009 Usage Remove and install Shimano® Hollowtech II bottom brackets Remove and install Campagnolo® Ultra-Torque and Power Torque bottom brackets Compatible with Race Face®, FSA®, SRAM®, Truvativ®, and Chris King® bottom brackets Fits external centerlock disc nuts