Block access to connect to your trailer, so someone can't drive away with it. These locks are useful when storing a trailer or making sure it can’t be moved while it’s being loaded and unloaded. They come with two keys that only the manufacturer can duplicate.

Cap locks are made from a solid block of iron and cover the entire pin, so they are hard to twist or pry off. Their locking bolt slides into place like a drawer, butting up against the kingpin to secure it. To make them tough to pick, the lock itself is recessed and uses rotating discs—like tumblers in a safe—instead of traditional springs and pins.

Choose keyed differently locks if you need locks that each open with a different key.

Choose keyed alike locks if you need several locks that open with the same key.