A simple precision-made component that provides valuable insurance against front derailleur malfunctions Used to good effect by top professional riders in the Olympic games World Championships Tour de France Giro d Italia Paris Roubaix & many more It acts a ramp to guide your chain & virtually eliminates the possibility of your chain dropping off the small chainring onto the bottom bracket helping to protect your frame & keep you in gear Highly recommended to prevent structural damage to carbon & aluminium frames but also protects the finish of any other frame material Complete with all mounting hardware & longer bolts for Shimano Campagnolo & SRAM derailleurs including a radius washer with a secure mounting interface for effective performance Fits onto braze-on frame mounts or a clamp-on front derailleur mount Designed to work with all double chainring bikes Made from 6061 T6 heat treated aluminium Finished with a wet-look powdercoat paint Adds only 10 grams of weight K-Edge products are proudly CNC machined in the USA & have a Lifetime warranty: you break it well replace it