This is not just four 8-ft panels and screws. The Onward PVC Slatwall system is designed to use edge/finishing trim around the installation. The 29100GRBC panel itself is 8 ft long × 12 in high. So for a finished installation, you should plan on the panels, mounting screws, and the appropriate perimeter/edge trim. The trim is what finishes the exposed edges and holds the ends in place.