Without high-quality locks, you can't protect your utility trailers and personal possessions. Our Model GRB-78 Trailer Lock is a safe, powerful lock designed to help you increase the security of your trailers. It's constructed with hardened steel that protects against bolt cutters, saws, and other power tools and features a unique key design that prevents someone from creating a copy of your key. Help protect your possessions and work equipment with our incredible heavy-duty coupler lock.

This custom-tailored trailer and RV lock is designed to fit only specific Ram or BullDog gooseneck trailer couplers.

Our secure trailer lock is easy to install and is made of 3 lock components: an inner slide, an exterior shield, and a puck lock. To use, attach the inner slide to your coupler and engage the latch. Place the exterior shield over the coupler and line up the 2 slide tabs. Then, place the puck lock over the tabs. Add this lock to your camper and travel-trailer accessories for durable protection of your belongings.

Proven Industries is a family-owned business dedicated to helping you safeguard your trailers from theft and damage. We manufacture our locks in the USA with care and attention to every detail. You can rely on our high-quality locking products.