Master Lock Trailer Hitch Coupler Lock, Keyed, RV Lock, Black 379ATPY

The Master Lock 379ATPY universal trailer hitch lock is a straightforward, effective security solution that does exactly what it’s meant to do. If you’re looking for an easy way to secure a trailer without overthinking the setup, this lock delivers dependable protection with minimal hassle. Fit and compatibility are strong points. The universal design works well across different types of trailers, including RVs, utility trailers, horse trailers, and tool trailers. It fits securely over the coupler and blocks it effectively, preventing anyone from hitching up and towing off your trailer. Once installed, it’s very clear the trailer isn’t going anywhere. Build quality feels solid. The lock has a good weight to it and doesn’t feel thin or easily defeated. While no lock is completely theft-proof, this one is sturdy enough to act as a strong deterrent. It sends a clear message that the trailer is protected and not an easy target, which is often half the battle when it comes to theft prevention. Installation is quick and simple. You don’t need tools or complicated adjustments. It slides into place easily and locks securely. Removing it is just as easy when you’re ready to use the trailer, which makes it convenient for regular use without becoming annoying. The locking mechanism works smoothly. The key turns cleanly without sticking, and the lock opens and closes without feeling gritty or cheap. That’s important for something that may sit outdoors and be exposed to weather. So far, it’s held up well without signs of binding or corrosion. The black finish keeps it discreet while still looking tough and purposeful. It doesn’t draw unnecessary attention, but it’s obvious enough to let would-be thieves know the trailer is secured. It also looks clean and professional, whether the trailer is parked at home, a storage lot, or a campsite. Overall, this Master Lock trailer coupler lock is a reliable, easy-to-use security accessory that does its job well. Strong fit, solid construction, simple operation, and broad compatibility make it a smart choice for protecting trailers of all kinds. If you want added peace of mind without complexity, this is an easy five-star product.

This Master Lock is an excellent product. It feels heavy-duty and secure, giving me way more confidence when I leave my RV at the campsite or in storage. The universal fit worked perfectly on my trailer coupler, and the black finish looks sleek while being weather-resistant. A small price to pay for such great security!

This Master Lock fits my trailer perfectly and feels very secure. It was easy to install and solidly built. Once it’s on, I feel confident that it will help prevent my trailer from being stolen. Definitely gives me peace of mind and I would recommend it to anyone looking for a reliable trailer lock.

The overall feeling of security is not there for me with this. I've used it with several different trailers now and each fit slightly different. I got a U-Haul box trailer and it took some positioning to get it to stay correctly, not it did work. I feel with a swift blow with a hammer or something of the like and this thing will give in rather easily. I may be surprised, but that's the feeling I get when I use it. If it didn't have the Master name on it I would certainly be even more concerned, but I'm rather trusting in their good name. I certainly feel like at least I'm using some security but again I question how much effort it might be to get it off. For that I take a star off. And the fact that it is a bit tough to install on certain hitches also affects my rating. All in all, it seems like a good product though and feels robust.

The Master Lock Black Universal Trailer Hitch Lock is simple, strong, and inspires confidence. It fits a wide range of couplers, locks up tight, and is easy to use. We use it on our drift boat while camping and pair it with a Master Lock Solid Brass Coupler Lock and a wheel clamp for extra security. Overkill? Probably. Solid construction, no fuss, just works.

This is the best trailer lock for me since i have 3 different ball size units and it works on all of them. A rugged construction and it looks like it will hold up to severe weather conditions.

Interesting assembly. Fits snugly around the hitch.

Works as Advertised

Great lock and works as should. 2 keys come with unit as well for extra security.

Great product

Wirkt massiv und passt auf alle gängigen Hänger Habe mich letzten Endes aber entschlossen es zurück zu schicken. Anwendung kann von mir also nicht bewertet werden.

Bastante práctico de usar y te da más tranquilidad de los distintos tipos de candados para cople este es mi favorito

Looks and feels very strong. Locking system works perfect after being left in rain/snow.