The Park Tool BBT-19.2 is designed for removing bottom brackets with a 16-notch tool fitting, including most Shimano models with outboard bearings. Made from high-precision hardened chromoly steel, this tool offers durability and reliability. It can be used with a wrench, socket, or 3/8″ drive wrench for easy operation, making it ideal for bottom bracket service, replacement, or upgrading.NOTE: Due to the shallow engagement of their tool fittings, the BBT-19.2 is not recommended for 16-notch disc brake rotor lockrings. Instead, use the Park Tool BBT-9 or BBT-69.4. Not designed for use with impact drivers or other power tools.