Model 2517-B1 was designed to fit the BullDog style trailer. This style trailer coupler is usually found on enclosed and equipment trailers. In most cases, Bulldog style couplers will be found on commercial trailers, but in some cases trailer manufacturers offer Bulldog couplers on non-commercial trailers as an upgrade.
This model is specifically for BullDog couplers that have a Dome shape on top. BullDog also makes a similar model that is square on top that this model will NOT fit. Please refer to the fine print section for further details.
Designing the best coupler locks is not an easy task. We pride ourselves on producing a glove like" fit coupler lock. Rest assured that Proven Industries trailer lock products will leave you with simply the best coupler lock on the market. This model will secure most size safety chains.
*Please note, product pictures may not represent current model, as products are revised. All locks are now upgraded to 7 pin tubular lock at no additional cost.
Cobra 7 (Standard Aluminum)
The Cobra 7 is a patented key system that was developed for the high-security needs in the vending industries. The COBRA tubular keyway is like no other with its 7 sided tubular keyway, this unique feature stops anyone from going to a hardware store to copy your key. This product offers a high-security solution for those that are looking for excellent exterior performance. COBRA 7 comes standard in all of our products at no additional cost.
The Cobra 7 system is geared for the business owner looking for a great performing lock system at an affordable price with key control.
Medeco M3 (Standard Stainless Steel)
Medeco comes as one of the oldest High-security lock manufacturers in the USA. You will find this high-security lock in most prisons, government facilities, and even the White House! This particular lock is virtually impossible to pick due to its rotating pins that not only need to be at the right height but the right rotation in order to unlock.
Medeco is typically needed for the high-security needs of companies that need key control or grandmaster key solutions. All parts are machined out of brass and hardened steel, for the combination of great exterior performance and high-security needs.