Maximize your visibility. All-purpose chests sit below the bedrail accommodating tonneau covers and lids. The Model 684-5-01 aluminum Full-Size Extra-Wide Chest features a diamond plate pattern with Black ARMOR-TUF Powder Coat finish ensures years of dependability and has a storage capacity of 18.6 cu. ft. The cover opens to 90° for maximum access using a unique offset hinge design that still allows installation flush against the truck cab. The rotary style latch mechanism keeps the cover tight against the weather seal and provides smooth 1 touch opening.