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.

Collar locks wrap around the kingpin before locking in place. They’re easy to install and bright yellow for high visibility.

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.