When it comes to safeguarding your trailer, investing in a high-quality lock is paramount. Proven Industries offers a range of trailer locks designed to provide robust security. In this review, we'll delve into the features, benefits, and potential drawbacks of their top models to help you make an informed decision.
Key Features of Proven Industries Trailer Locks
1. Heavy-Duty Construction
Proven Industries locks are renowned for their durability. Crafted from ¼-inch hardened steel, these locks are designed to withstand tampering and resist cutting attempts. The inclusion of a CNC laser-cut and TIG-welded inner shield and outer slide enhances their strength and security.
2. Advanced Locking Mechanisms
Many models feature the Cobra 7 high-security lock system, a patented 7-pin tubular keyway that prevents unauthorized key duplication. For those seeking enhanced protection, optional upgrades like the Medeco M3 lock, trusted by government facilities, are available.
3. Versatility
Proven Industries locks are designed to fit a variety of coupler sizes and styles, including A-frame welded-on and straight bolt-on couplers. Some models also accommodate safety chains, providing comprehensive security for your trailer.
Top Models Overview
Model 2516
This model boasts a ¼-inch all-steel body with a black powder-coated finish for added durability. Its three-piece design includes a puck lock, inner shield, and outer slide, offering exceptional security. The lock is also versatile, fitting both couplers and safety chains.
Model 2178
Designed for 2-inch couplers, the Model 2178 features a robust construction and a secure mounting system. It has received positive reviews for its build quality and effectiveness in deterring theft.
Model S175
As a more affordable option, the S175 offers a "glove-like" fit for various coupler types. It utilizes the Cobra 7 lock system, ensuring high security at a lower price point.
Proven Industries Model 2516 Trailer Lock, Fits 2 5/16-Inch Couplers, Secures Safety Chains, Made in The USA, (Blue)

Proven Industries
Model 2516 Trailer Lock, Fits 2 5/16-Inch Couplers, Secures Safety Chains, Made in The USA, (Blue)
- HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your trailer or camper from being stolen. Our strong coupler lock fits select 2 5/16-inch trailer couplers to help keep your trailer secure.
- TOUGH LOCK: The locking parts on this device are constructed from hardened steel for increased security, and the exterior cover is tough enough to stop burglars from using power tools, hammers, and crowbars on your lock.
- UNIQUE KEY DESIGN: Our trailer lock has a special key design that prevents anyone from picking the lock. This innovative key system also features an interior locking mechanism that stops would-be thieves from making a copy of your key.
- CUSTOM TRAILER-COUPLER LOCK: This custom-tailored lock will only mount on very specific 2 5/16-inch couplers. Make sure to check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler.
Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)

Proven Industries
Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)
- HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your trailer or camper from being stolen. Our strong coupler lock fits select 2-inch trailer couplers to help keep your trailer secure.
- TOUGH LOCK: The locking parts on this device are constructed from hardened steel for increased security, and the exterior cover is tough enough to stop burglars from using power tools, hammers, and crowbars on your lock.
- UNIQUE KEY DESIGN: Our trailer lock has a special key design that prevents anyone from picking the lock. This innovative key system also features an interior locking mechanism that stops would-be thieves from making a copy of your key.
- CUSTOM TRAILER-COUPLER LOCK: Our patented lock design will allow you to secure most standard S-hook style safety chains in the lock. This custom-tailored lock will only mount on specific 2-inch couplers. Make sure to check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler.
Proven Industries Locks Model S175: 2 inch Trailer Hitch Lock, Fits Select 2 inch Couplers (2-Inch)

Proven Industries
Locks Model S175: 2 inch Trailer Hitch Lock, Fits Select 2 inch Couplers (2-Inch)
- HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your boat or trailer from being stolen. This strong coupler lock fits select 2-inch trailer couplers and will keep your vehicle or boat secure.
- TOUGH RV LOCK: Our lock uses a solid stainless steel locking pin encased in a ductile iron shell for increased security. The exterior cover has a black powder-coated finish and is tough enough to stop burglars from using bolt cutters and crowbars on your lock.
- UNIQUE KEY DESIGN: This boat and trailer lock has a special key design that prevents anyone from picking the lock. Our innovative key system also features an interior locking mechanism that stops would-be thieves from making a copy of your key.
- CUSTOM TRAILER-COUPLER LOCK: This custom-tailored lock will only mount on specific 2-inch couplers. Check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler.
Proven Industries Trailer Lock FAQs
Where are Proven Industries trailer locks made?
They domestically manufacture their lock bodies in the USA.
Do they offer a way to lock a 5/16 trailer coupler?
Yes, Proven Industries offers a lock specifically designed for 5/16 trailer couplers. It is important to note that not all of their locks are compatible with this size, so be sure to check the product specifications before purchasing.
Are Proven Industries trailer locks weather-resistant?
Yes, all of their locks are made with durable materials and finishes that make them resistant to harsh weather conditions. This ensures your lock will continue functioning properly even in extreme temperatures or wet environments.
Can I get multiple keys for my trailer lock?
Proven Industries offers the option to purchase additional keys for their locks. This is especially useful if you have multiple people who easy need access to your trailer.
Conclusion
Proven Industries trailer locks offer more options with a combination of durability, advanced security features, and versatility, making them a strong choice for anyone looking to protect their trailer. While there may be some fitment considerations and more expensive in the beginning, the peace of mind they provide means you're trailer is secure no matter how many thieves are watching. Always ensure compatibility with your specific trailer model before purchasing to maximize the lock's effectiveness. Order today!