Optional Storage Products Enforcer Lock Enforcer Trailer Locks are designed to secure to the locking rods on a container’s or trailer’s swinging doors. It gives a tight fit on virtually every trailer and container. Disc Lock These disc locks represent an improvement on standard padlocks in that their design makes them almost impenetrable to bolt cutters. KingPin Lock The ring body slides on to a trailer’s fifth wheel connector (king pin) to prevent a potential thief from pulling up, hitching, and driving off. No tools are required, simply slide the king pin lock into place and turn the key. Shelving We can help you with shelving and storage solutions to maximize your storage space utilization.