A lightweight chain retention guard for single chainring bikes; can also replace the outer chainring on a double set-up Ring-specific sizes for optimum performance Precision-machined mounting holes are recessed to provide the best fit & a clean look Please note that these are not designed to be used as a heavy-duty bashguard Made from 6061-T6 heat treated aluminium Finished with a wet-look powdercoat paint K-Edge products are proudly CNC-machined in the USA & have a Lifetime warranty: you break it well replace it