Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 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 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 Master Lock 379ATPY is a sturdy, reliable hitch lock that fits most trailers securely. The black finish resists rust, and the dual-locking mechanism provides extra theft protection. Easy to install and remove, yet tough enough to deter tampering. Great value for the price—highly recommended for peace of mind!

My son picked out this trailer hitch lock and says it is very sturdy and should do the job with no problems.

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.

Sleep more comfortable knowing the hitch has a good lock. Great value and easy to install.

Fantastic product master locks always a great product to work with if you wanna securely lock and have your units safely contained highly recommended for all your camping, trailers boats, etc.

Had for two years and still works great. Been outside in the rain and snow. No rust

Great product

Muy buen artículo. Se ajusta bien sin importar el tamaño y grosor de la almendra de recepción.

At first I thought it didn’t fit my hitch - to telly my fault. There are no instructions with it - just the picture on the outside of the box. I didn’t think to list the lever on the hitch so the lock would rest inside and then once I closed the lever I understood how it was supposed to work. Then turn the key and go. 👍.

Worked as stated and just the appearance is a good deterrent to theives.

Feels good and strong, but doesn’t fit on couplings with an anti rattle bolt.