The K-Edge Chain Catcher Professional is a lighter version of the original K-Edge chain catcher, that has been tested and proven. Features: Prevents missed front shifts and frame damage from a dropped chain For use with braze-on front derailleurs only Compatible with Campagnolo, Shimano and SRAM front derailleurs 2-Bolt radius washer allows chain catcher "finger" adjustment independent of the front derailleur Precision machined, anodized 6061 T6 aluminum Specifications: Type: For Braze-On Derailleurs Color: Black Weight: 10g