i off a key in a lock. i took the lock off the door and the lock had a label on it that referred to rvlocksandmore. i called them and ordered a new lock. i also asked them what they recommended to use as a lubricant. they said white lithium grease. it is easy to lubricate the lock and replace it. also ordered some extra keys for the storage compartments. seems like the entire rv world uses the same keys. but rvlocksandmore was more than helpful and very prompt in shipping.