This Shimano TL-FC25 Bottom Bracket Adapter Installation Tool is designed for the installation and removal of bottom bracket cups. It is compatible with SM-BBR60 and BB-MT800 bottom brackets. The tool can also be used with any standard Hollowtech-II bottom bracket tool and is intended for use in conjunction with Shimano TL-FC37 or TL-FC32 tools. It is constructed from glass-reinforced resin. This is a genuine Shimano replacement part. Please note: This tool is not suitable for use on Dura-Ace SM-BB9000 and BB-R9100, or XTR SM-BB93 bottom brackets.