If your rock guards get stretched and do not fit snug on your 4x4 lights,try putting velcro on the inside lip of the plastic covers, the velcro that has glue on one side,cut into about 1 inch pieces stick on one side test the covers and see if snug??? If not put another piece on the otherside until covers are nice and snug,this simple trick will always keep your guards nice and snug to your fog lamps.

Stone guards in my ebay store