10 Best Trailer Tongue Locks 2025 in the United States

The Master Lock 379ATPY Universal Trailer Hitch Lock is a versatile option that fits a range of trailer couplers, specifically 1-7/8 inches, 2 inches, and most 2-5/16 inches sizes, making it suitable for various vehicles, trailers, and RVs. One of its standout features is the advanced locking mechanism designed to resist picking and prying, enhancing security. Constructed from zinc, the lock is durable and resistant to rust and corrosion, which is a significant advantage for outdoor use.

The inclusion of two keys adds convenience, ensuring you have a spare if needed. However, users should note that while zinc is rust-resistant, it may not be as strong as other materials like hardened steel. This lock is also relatively portable, given its dimensions of 5.1 x 3.5 x 4.6 inches. The brand Master Lock has a solid reputation for producing reliable security products, which adds an element of trust.

On the downside, the key lock mechanism might not be as quick and easy to use as some alternative locking mechanisms, like combination locks. Additionally, while the product claims weather resistance, it's essential to ensure regular maintenance to keep the lock in optimal condition. The Master Lock 379ATPY is a dependable choice for those seeking a balance between security, compatibility, and durability.

The AMPLock U-BRP2 is a strong and reliable trailer coupler lock designed for 2-inch ball hitches, making it a solid choice for RVs, boats, and travel trailers. It’s made from rust-resistant stainless steel, so it stands up well to harsh weather and resists corrosion, which is important if you store your trailer outdoors. The lock uses a patented two-part push-and-lock system, allowing you to secure your trailer quickly and without fuss—this ease of use can be a big plus if you want dependable security without complicated steps.

Its snug, customized fit helps deter theft effectively, and the design also protects against more advanced break-in attempts, adding extra peace of mind. With a strong brand reputation reflected in many positive reviews and a one-year limited warranty, it’s clear this lock is trusted by many users. On the downside, it weighs about 10 pounds and is somewhat bulky, which might make it less convenient to carry around frequently.

Also, while the lock fits standard 2-inch ball couplers, it won’t work with other sizes, so compatibility is limited to that hitch size. If you need a heavy-duty, weatherproof lock that’s easy to use and offers solid theft protection for a 2-inch trailer ball, the AMPLock U-BRP2 stands out as a dependable option.

The METOWARE Universal Trailer Hitch Locks offers a robust solution for securing various trailer couplers, fitting 1-7/8”, 2”, and 2-5/16” sizes. Made with a combination of aluminum and high-strength iron, this lock is built to resist corrosion and rust, ensuring durability and long-lasting protection. The locking mechanism is enhanced by a zinc alloy tubular core, which integrates advanced anti-theft technology, making it secure and reliable.

Additionally, the lock features an all-weather rubber cap that shields it from dust and water, adding to its weather resistance. The ease of use is a standout feature, thanks to its ratchet design with 11 adjustable locking positions, allowing for quick and hassle-free installation and removal. The lock's universal compatibility makes it a versatile choice for various vehicle service types, including buses, RVs, and trucks.

However, some users might find the 3.36-pound weight slightly cumbersome for frequent handling. The METOWARE Universal Trailer Hitch Locks is a durable, secure, and user-friendly option for trailer owners seeking reliable theft protection.