Heavy-duty tri-fold and bi-fold hard covers built for maximum protection. Aluminum or FRP panel construction with weather-tight seals on all four sides. Folds up toward the cab for full bed access. Supports 400+ lbs on top when closed. Clamp-on installation — no drilling required. Available for Ford F-150, Chevy Silverado, GMC Sierra, Ram 1500, Toyota Tundra, and more.