10 Best Trailer Tongue Locks 2025 in the United States

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.

The Master Lock 379KA-4 Keyed Alike Universal Trailer Coupler/Tongue Locks offer a practical solution for securing trailers with a set of four locks that all operate with a single key. This feature is particularly convenient for individuals managing multiple trailers, as it reduces the hassle of dealing with different keys. The reinforced zinc die-cast material provides impressive durability and resistance to rust and corrosion, making these locks suitable for outdoor use. This construction also offers high impact resistance, which is beneficial for withstanding potential tampering attempts.

The locks are designed to fit a wide range of trailer couplers, enhancing their compatibility across different brands like Reese, Fulton, and others. The advanced locking mechanism is intended to resist picking and prying, offering a layer of security against theft. Additionally, the locks are lightweight and straightforward to install, which aids users who may not be mechanically inclined.

While the product comes with a Limited Lifetime warranty, if multiple packs are ordered separately, they may not be keyed alike unless specified. This could be a drawback for users expecting uniformity across their locks. Furthermore, while the zinc material is robust, it may not offer the same level of security as more advanced locking systems or materials designed to withstand extreme force or sophisticated break-in techniques. These locks are a solid choice for general trailer security needs, backed by a reputable brand. They are especially ideal for users seeking ease of use and effective protection against casual theft attempts, though users with high-security demands might want to explore additional options.