Our story began with a family trailer being stolen with thousands of dollars of

equipment inside. We decided to develop strong, durable locks to ensure that wouldn’t happen again to anyone.

You will need Model 2517-D1

You will need Model 2517-D

You will need Model 2516

Fits 2 5/16" Couplers

This lock fits 2 5/16" Demco Cast style couplers

Fits 2 5/16" Couplers

This lock fits 2 5/16" Demco Stamped style couplers

Fits 2 5/16" Couplers

This lock fits 2 5/16" trigger latch and thumb latch couplers.

Secures Safety Chains Inside

There is a lower compartment on the lock to secure your safety chains inside.

Secures Safety Chains Inside

There is a lower compartment on the lock to secure your safety chains inside.

Secures Safety Chains Inside

You can secure your safety chains around the ball profile on the inner slide.

How did we get our start?

Demo Video for Model 2517-D1

Proven Industries has a lock for every coupler style

• CUSTOM TRAILER-COUPLER LOCK: This custom-tailored lock will mount only on Demco cast couplers. Check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler.
• HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your trailer from being stolen.
• TOUGH LOCK: The locking parts on this device are constructed from hardened steel for increased security, and the exterior cover is tough enough to prevent burglars from using power tools, hammers, bolt cutters, and crowbars on your lock.
• UNIQUE KEY DESIGN: This trailer lock has a special key design that prevents lock picking for added trailer security. Our innovative key system also features an interior locking mechanism that deters would-be thieves from making a copy of your key.
• PROVEN INDUSTRIES: We are dedicated to providing our customers with the most effective trailer locks on the market. We carefully research and manufacture our locking systems from conception to fabrication in the USA.