Description Model 2517-D1 was designed to fit Demco style Cast trailer couplers. This style trailer coupler is usually found on heavy duty enclosed car trailers such as those used in show car transportation applications, Demco style trailer couplers will be found on enclosed car trailers, but in some cases trailer manufacturers offer Demco couplers on non-commercial trailers as an upgrade. If you have a Stamped Demco Coupler Please see Model 2517-D . 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. Fine Print Trailer coupler lock model 2517-D1 may not fit all trailer couplers. Please look at trailer coupler lock index pictures below, if you do not see your trailer coupler picture please fill out the contact form to ensure you will get the correct trailer coupler lock. Coupler lock in most cases can secure 5/16 safety chains hooks, we can not guarantee all chains hooks will fit due to all the different manufactures sizes. *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. Lock Core Cobra (Standard) The Cobra 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 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 comes standard in all of our products at no additional cost. Application The Cobra system is geared for the business owner looking for a great performing lock system at an affordable price with key control. Proven Disc-Detainer (Upgrade Option) The Proven Disc Detainer Lock was developed for high-security situations where minimum maintenance is not possible. This particular lock is virtually impossible to pick due to its rotating disk and requires special lock picks and skills needed in order to pick. Application Disc detainer locks are not all that common in everyday use. Mainly this style of lock is reserved for high-end locks. These lock perform well in extreme weather conditions with minimum if any maintenance. Medeco M3 (Available upon request, for additional cost) 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. Application 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. Abloy (Available upon request, for additional cost) Abloy cylinders provide high-security protection by using a unique rotating disc mechanism. Unlike standard locks, they are virtually unpickable, bump-proof, and designed to withstand harsh road conditions and outdoor environments without jamming. *Medeco and Abloy is available upon request for an additional fee. Please call customer support for additional information.
