K-Edge Cyclo-Cross Clamp on Chain Catcher (Double): The Cyclo-Cross Clamp on Chain Catcher 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 A simple precision-made component that provides valuable insurance against front derailleur malfunctions Specifically designed for the extreme conditions of cyclo-cross, it is designed to give the rider the confidence to front-shift in any situation Highly recommended to prevent structural damage to carbon & aluminium frames, but also protects the finish of any other frame material Clamps onto the frame independently of the front derailleur mount using its own lightweight clamp, so requires some round seat tube in the area below the derailleur Designed to work with all double chainring bikes Made from 6061 T6 heat treated aluminium Long-lasting protective anodised finish Adds only 22 grams of weight