The K-EDGE chain catcher mounts to all braze-on type front derailleurs. Prevents frame damage from a dropped chain.10 gramsFor use with braze-on front derailleursIncludes all mounting hardware for Shimano, SRAM and Campagnolo front derailleurs, including a new radius washer with secure mounting interface6061 T6 aluminumProtects your valuable frame from damage caused by a derailed chainItem SpecificationsFront Derailleur ClampBraze-on