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Quantity
1
Description
Model 2178-U was designed to fit 2'' UFP trailer couplers. The UFP trailer coupler is mostly found on boat trailers but in some cases trailer manufacturers offer UFP couplers as an upgrade. This is not common practice but this ...
Reviews
4.8
214 ratings
Greatest Trailer Security Available!
Once again, Proven Industries has provided me with another bulletproof trailer lock! When I needed to park my boat trailer outside of my vacation home where it is not monitored daily, there was no doubt to the best security measure I wanted. . . . . . Proven Industries' Proven Locks! Best fit, awesome coating and finish, tough as a tank and fantastic customer service! I love the fact that I now have many trailer locks and only one key to deal with. Do yourself a favor and get one today!
Chad · 3 days ago
Really good lock. Looks good sold construction
Once I figured out how to use it and lock it, it's really good, solid and simple. No directions in the box which is a miss. I didn't have my phone to go to YouTube when I was standing in front of my trailer. Suggestion to include some written instructions with pictures. Otherwise great product. Should be for the price.
Fred · April 23, 2026
This lock works great on our boat trailer coupler. A piece of cake to install. I like how it houses the security chain ends inside the unit in addition to securing the ball receptacle.
