Shimano XTR FD-M9100 Chain Catcher Unit Description: This Shimano XTR FD-M9100 Chain Catcher Unit works to replace or repair Chain Catcher Units found onboard Shimano XTR FD-M9100 front derailleurs, along with many others. Features: Replacement Chain Catcher Unit for Shimano XTR FD-M9100 front derailleurs See compatibility tab for full list of compatible derailleurs Specifications: Color: Black/Silver