10 Best Trailer Tongue Locks 2026 in the United States

The Rhino USA Trailer Hitch Coupler Lock Kit is designed to secure 2-inch trailer couplers, making it suitable for boats, RVs, travel trailers, and more. Constructed from reinforced solid steel, it promises strength and durability, which is essential for anti-theft protection. The lock kit features a black powder coating to prevent rust and corrosion, enhancing its weather resistance and making it a good choice for extended outdoor use. This is particularly beneficial if your trailer is frequently exposed to harsh weather conditions.

In terms of compatibility, it fits most 2-inch couplers with a maximum coupler lip width of 3-3/4 inches and height of 3/8 inches, ensuring it can secure a wide range of trailers. The product's ease of use is another significant advantage, as it provides peace of mind and confidence in securing your trailer. However, it is worth noting that while the product description emphasizes American ownership and family operation, the lock is manufactured in China, which might be a consideration for some buyers. Additionally, at 1.89 pounds, it is relatively lightweight, which could be seen as both a positive for portability and a potential concern for those who equate weight with strength.

The Rhino USA Trailer Hitch Coupler Lock Kit is a solid option for trailer owners looking for a reliable, durable, and weather-resistant lock to protect their property from theft.

The NiwNiw 2-5/16" Heavy Duty Trailer Hitch Lock is a solid choice for anyone needing strong protection for heavy-duty trailers. Made from alloy steel with a corrosion-resistant powder coat, it offers excellent durability against harsh weather conditions like coastal salt spray or snowstorms. Its design fits 2-5/16 inch couplers perfectly, creating a tight seal that reduces the chance of tampering, making it ideal for RVs, boats, utility trailers, and more.

The lock uses a patented push-button puck mechanism that lets you secure the trailer quickly without fumbling for keys, which is handy for busy or hurried situations. When you need to unlock, the included three drill-resistant and anti-pick keys provide reliable security without hassle. Customers appreciate the lock’s toughness, noting it resists cutting and freezing attacks, supporting the claim that it’s built to withstand serious theft attempts. The NiwNiw brand has a decent reputation, with positive user reviews highlighting its real-world durability and ease of use.

One consideration is its size and weight (over 11 pounds), which might be bulky for some users, and the product doesn’t come with a warranty, so keep that in mind. Also, it’s specifically made for 2-5/16 inch couplers, so double-check your trailer’s size before buying. If you want a weatherproof, heavy-duty lock that’s straightforward to use and offers excellent anti-theft protection for larger trailers, this NiwNiw model is worth considering.

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.