10 Best Fifth Wheel Locks 2025 in the United States

The BOYISEN 5th Wheel King Pin Lock stands out due to its solid steel construction, which offers robust anti-theft protection for RVs, container trailers, and campers. This heavy-duty lock is designed with ease of use in mind, featuring a convenient handle and an outward-facing turn cylinder, making it simpler to lock and unlock.

The inclusion of three unique keys ensures you have backups and eliminates the worry of others having the same key, thanks to the specially designed blossom lock mechanism that provides enhanced security against break-ins. The lock's high visibility, with an attached warning tag, acts as a reminder to remove it before hitching, which can be particularly handy.

Weather resistance is another crucial aspect, and the solid steel material promises durability, making it suitable for various weather conditions and ensuring a long lifespan. The lock's universal fit makes it versatile for use with different vehicles like RVs, boats, and campers, making it a practical choice for multiple users, including trucking companies and RV dealers.

The BOYISEN 5th Wheel King Pin Lock is a solid choice for securing fifth-wheel trailers, RVs, and campers. Made from solid steel, it offers a durable and robust solution that is hard to break, providing substantial resistance against theft attempts.

One of its standout features is the added handle and an outward-turning cylinder, making it more user-friendly compared to other designs that have downward cylinders. This makes locking and unlocking more convenient, which is a big plus for regular use. The lock comes with three keys, ensuring you have backups in case one goes missing. Additionally, the lock is keyed uniquely, so you won't have to worry about other BOYISEN lock owners having the same key.

Its high visibility, thanks to the warning tag, helps ensure you don't forget to remove it before hitching and acts as a deterrent to theft. The lock is designed to withstand various weather conditions, which is crucial for outdoor use, ensuring it remains functional over time. It fits universally, making it suitable for a range of vehicles, from RVs to semi-trailers. However, at 2.2 pounds, it is relatively lightweight, which might give an impression of less sturdiness to some users despite its solid steel construction. Another potential drawback is that while it is resistant to most tampering methods, no lock is entirely invulnerable. Still, its robust design and thoughtful features make it a reliable choice for anyone needing a secure fifth-wheel lock.

The Proven Industries Model PL-5 Fifth-Wheel Kingpin Lock is designed to provide robust security for industrial and heavy-duty fifth wheels, including 18-wheelers and RVs. Made in the USA, it boasts a solid-steel TIG-welded collar and a 303 stainless-steel pin, making it highly resistant to power tools and bolt cutters.

Its unique key design prevents lock picking and unauthorized key duplication, enhancing security further. The lock is versatile, fitting various fifth-wheel trailers and accommodating lube plates, which adds to its universal appeal.

Some might find its weight (4 pounds) a bit cumbersome. Additionally, the product does not mention any specific weather-resistant features, which could be a concern for users in harsh climates. Despite these minor drawbacks, if you need a reliable and sturdy lock to protect your trailer or RV from theft, this model is worth considering.