K edge road chain catcher used by professionals in the olympic games world championships paris roubaix giro ditalia and tour de france its a common sense design that provides a functional advantage for high performance cyclists the k edge chain catcher is aprecision component that enhances the overall function of your drive train while protecting your valuable framespecificationsmaterial 6061 t6 aluminumfitment all braze on type mounted and clamp style braze on mounted front derailleurs