These are rocker guards,and so we intentionally took them out to the desert and rubbed them on some rocks. The result is that our rockers and doors are still in good shape despite what Mother Nature tossed in our way. We’ll keep beating on these units for a full durability report in the future. So far, we are not sure we are in love with the blocky step-like looks, but as they say, beauty is in the eye of the beholder and the parts from 4xGuard sure make getting up to that Yakima rack easy. Also, the size helps keep the bulging WJ doors out of the rocks or trees.