60" Aluminum Ladder for 48" to 52" Dry Van, Box Truck & Trailer Decks. Designed to support up to 375 lbs. for access to a dry van, box truck, or flatbed trailer deck. Includes (2) C-Brackets for storing the ladder in an upright position and (2) caster wheels to push the ladder out when the trailer is under a heavy load. Can be locked to the trailer deck with a cable or chain lock. No tools required, slides over transport trailer rub rails and is pinned in place. All-Aluminum construction for long lasting durability.