Transport Truck Step Deck Ladder for 36in to 66in high trailer decks. No tools required slides over transport trailer rub rails and is pinned in place. Designed to support up to 375 lbs. for access to a step deck or drop deck transport trailer. 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. All-Aluminum construction for long lasting durability.