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Trailer theft is a real concern, but the Blue Ox Adjustable Trailer Coupler Lock makes it a whole lot harder for thieves to make off with your rig. With an adjustable span from 7/8" to 3-1/2", this lock snugly secures latch-style and surge brake couplers, so your trailer stays right where you left it. The lock is designed to fit a variety of trailers, accommodating different widths with a 1/4" diameter zinc-plated steel shank—this flexibility ensures your lock stays useful as your towing needs change.
Worried about rust and corrosion on your gear? The Blue Ox Lock's zinc-plated steel construction means it’s tough enough to stand up to the elements. This means you don't have to worry about it becoming a rusted mess over time. Its durable build is not just about standing up to the weather, it also gives you peace of mind that your lock will function just as well after months of use as it did on day one.
Fumbly lock mechanisms are a hassle, especially in the dark or in bad weather. That’s where the swivel-head, side-entry lock really shines. It makes locking and unlocking your coupler a breeze, ensuring a snug fit and securable placement every time without any false latches. Plus, with just a 1/4 turn, you can lock or unlock it without a fuss.
With its universal application lock, this coupler lock is perfect for just about any setup. It comes uniquely keyed to provide more security than generic locks while offering the convenience of a single set of keys. Stop juggling multiple keys for different locks and keep your trailer secure with the same ease every time. It's universally fit for 2-inch hitches, giving you flexibility for various towing setups.
Gone are the days of misplacing your only key. The Blue Ox Trailer Coupler Lock includes two keyed-alike keys. This means you can keep one with your vehicle keys and have a spare just in case, ensuring that you're never stranded without access to your own equipment. It's a small detail that really enhances user convenience.
This lock doesn’t just work on the coupler—it also provides a secure latch on trailer brake actuators that lock through the body. Whether on the road or parked at a site, having this added security means your trailer stays yours and others find it much less appealing. The adjustable design also makes it great for pairing trailers with different brake actuator types.
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Lock was a replacement for an old one. This one works but the key/lock mechanism was a bit sticky. Fixed it with some lubricant. E-Trailer shipping was great and arrived on expected date.
Versatile! This is a adjustbale and will fit a few different trailers I tow. It's stainless stell too.
The lock fits my application, but having a difficult time getting it to lock into the right groove, can get it every time on the one that is just to small. Going to play with it some more and see if I can figure out the trick
Unfortunately, I cannot evaluate because I did not use the lock. I did test it on our trailer and found it very easy to use.
We had bought these before for another trailer. Liked them so much we needed them again for a another trailer. Great product. Fast shipper.
Skittles
4/8/2024
Great. We liked them so much we got again for an additional trailer. No complaints. Would definitely recommend
keeps my trailer locked up, cant trust the thieves!
It works and is more secure than the other options without a locking mechanism!
Works as advertised and will add a deterrent to trailer theft in the area.
Exactly what I was looking for excellent product
Anonymous
5/21/2024
Very good
This product is amazing. Works perfectly with my boat trailer and is made of very high quality materials and finishes. Since it’s adjustable it can accommodate different trailer widths. I feel safe when this is locked and secured on my trailer. I would highly recommend this product.
Supposedly an adjustable lock but only works on the largest setting which means if you have something smaller it leaves it vulnerable to bolt cutters. Virtually worthless because of this
Jenny N.
2/10/2023
I like your honesty. It is a sad fact that any lock can be defeated if a person is determined enough. We consider the locks to be a theft deterrent against an easy theft.
Received very quickly and fits perfectly. Quality built. The lock will keep honest people honest!
Excellent quality.
Fast and accurate delivery.
Thank you
great design, hasn't corroded yet, doesn't look like it will.
Item was as expected and serves my purp ose
Just another layer of security for my trailer when parked and in transit
Just what i need for the new trailer. Easy to order and got the item quickly
Fits well and communication with etrailer has been great.
Richard
5/2/2024
Works great and gives me a peace of mind when I have my trailer attached.
Shipping and communication was timely and accurate. Very easy to do business.
Increments need to be smaller for a tighter fit!
Arrived as described.
Info for this part was:
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Eric
5/29/2025
Works just fine after a year