Bolting on the Rock Hard 4x4 Rocker Sliders is very easy. We used a floor jack with a large bumpstop to hold the sliders in place while we drilled out a few mounting holes with a 3⁄8-inch drill bit. Line up the rear edge of the rock slider with the front bottom edge of the stock fender flares. The rear-most bolt hole on the side and bottom of the rock sliders require the two longer bolts. These rockers add protection as well as cover up any rocker damage your YJ may have…like ours did.