K-Edge Pro Chain Catchers. A lighter version of the original K-Edge chain catcher, the Pro has been tested and proven.6061 T6 aluminum construction for light weight - 9.8 grams including hardwareLocking system allows installation and setup of front derailleur separate from adjustment of the chain catcherCompatible with all braze-on road front derailleurs from SRAM, Campagnolo, and ShimanoItem SpecificationsFront Derailleur ClampBraze-on K-Edge Pro Road Chain Catcher Chain Deflector UPC: 858953003230