Toolboxes are constucted of powder coated aluminum in a Diamond Plate tread pattern. Toolboxes can hold up to 300 pounds of cargo depending on vehicle application. Features include key-locking single lid design- gas cylinders for easy lift and full weather stripping to help seal out moisture and dust. 5.7- 6.4 and 8.0 Conventional Bed Sliding Toolbox. Must be used with Mopar Pickup Box Utility Rails (sold separately). Single-lid Opening. Measures 56L x 20W x 14D. Maximum Capacity -- 200 Lbs.