Fits bulldog style trailer couplers for heavy-duty and commercial trailers, ensuring compatibility with common trailer types
Patented 7-pin tubular keyway prevents key duplication, enhancing security for business owners
Cobra standard key system offers high security and is included at no additional cost
Durable construction with plastic and metal materials for reliable exterior performance
Manual operation allows for easy, tool-free installation and removal
Summarized by Shop
Description
Model 2516-B was designed to fit BullDog style trailer couplers. This style trailer coupler is usually found on heavy duty trailers such as those used in commercial applications and heavier weight-rated trailer applications. In most cases, Bulldog style trailer couplers will be found on commercial trailers, but in some cases
Compatible Coupler Type
Bulldog style trailer coupler
Lock Type
Manual, 7-pin tubular keyway
Material
Plastic, Metal
Manufacturer Type
Aftermarket
Item Condition
New
Summarized by Shop
4.7
225 ratings
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Excellent Craftsmanship
I recently purchased and installed a Proven Industries lock for our Cargo trailer "Model 2516-B". This by far is one of the most heavy duty, and sturdiest locks I have ever purchased. The lock fit perfect, and any thieves that try and steal the trailer now are going to have their work cut out for them. This is very well manufactured and worth the money in my opinion!
S
Sonny · August 27, 2026
The Tank!
This is built like a tank, just like my trailer. My trailer is parked in a busy suburb where things disappear from time to time. I feel confident this lock will deter a thief or draw to much attention. I will be buying more for my other trailers. Protect your investment, hands down!
T
Trent · August 24, 2026
Seems to be just what I needed for my car hauler. Don’t have to rely on a cheap parts house lock that can be broken with a hammer.