Best Trailer Locks to Help Secure Your Trailer

Updated 08/08/2026 | Published 08/04/2026

Question:

Do you sell trailer locks? I need to secure my trailer.

asked by: David W

Expert Reply:

Yes, we do! A great all around option is the Master Lock Trailer Security Set, part # ML44VR. It comes with an adjustable coupler ball lock, a coupler latch lock, and a locking hitch pin, and they're all keyed alike so you only have one key to keep track of. It's a solid setup if you're looking for a convenient way to add some extra security to your trailer.

That said, we also carry heavier duty locks depending on your trailer and what you're trying to protect. If you're mainly looking to secure the coupler while the trailer is parked, I'd be happy to recommend the best option. I just need to know what size hitch ball your coupler uses, whether it's 1-7/8 inch, 2 inch, or 2-5/16 inch, or what style of coupler you have. If you're looking to lock the hitch pin instead, we can help with that too.

What kind of trailer are you trying to secure, and are you mainly looking to lock the coupler or the hitch?

expert reply by: Heather A

Wyatt N.

8/7/2026

I bought this lock set a while back, maybe a year ago. I like the coupler lock (red) and the hitch pin lock and like that they use the same key. I don’t like the coupler latch lock because I think it’s too easy to cut through, so I bought a separate lock where the shaft is only 3/4” to 15/16” long and almost totally covered by the coupler latch assembly.

Don

8/8/2026

I've had my ML44VR, Master Lock Set, for about a year now. I like the coupler ball lock and coupler locking pin. I have a Demco EZ hitch with 5/16" hole for the coupler latch pin. The coupler latch pin did not work well for me. The Demco EZ hitch design is the issue, it doesn't let the grooved pin slide through very easily. Otherwise, the locking kit is great and I'd fully recommend it in both quality and function.