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 and 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 and have a lifetim