This Shimano tool is required for the installation and removal of the O-Ring holder and chainring on the Shimano STEPS chainring (SM-CRE60). This adapter removal tool is designed to be used in conjunction with the Shimano TL-FC36, TL-FC33, or TL-FC32 tools and will provide precise and accurate tooling. It is constructed from hardened steel for durability and to provide a solid engagement when working on your Shimano drivetrain.