Keep your trailer safe from towaway theft with this universal coupler lock. Its tough frame fits in and around most 1-7/8", 2", and 2-5/16" ball couplers; and it has a bright red color and heavy-duty construction to deter theft.
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Note: This product cannot be keyed alike.
Average Customer Rating: 4.8 out of 5 stars (548 Customer Reviews)
Keep your trailer safe from towaway theft with this universal coupler lock. Its tough frame fits in and around most 1-7/8", 2", and 2-5/16" ball couplers; and it has a bright red color and heavy-duty construction to deter theft.This is just the anti-theft deterrent device we have been looking for. We have an Excavation business and keep a lot of expensive tools and equipment in a 6x12 trailer. We can sleep at night knowing our trailer will still be there in the morning. This thing is very easy to put on and take off. 539334
Got one for insurance purposes. It does go on my boat trailer coupler, but could stand to be a little tighter. Seems just a little loose, although this is my 1st one maybe this is the way their supposed to fit. 395516
So happy to get this product. Simple, easy, and ease of mind having it! 546088
Works well I like the fact that it`s easy to connect, fits 1-7/8" ball up to 2-5/16" and protects my trailer peace of mind 538504
I feel much better about parking my trailer on the street with this lock on the hitch. Not only does it lock up the hitch securely but the bright red color signals to prospective thieves that this trailer cannot be towed. It is easy to attach and easy to remove. Also very compact so it can be stored easily. The shipping time was less than I expected. etrailer.com is my goto supplier for my trailer accessories. 467210
This is a terrific design since unlike padlocks, can't easily be cut with bolt cutters. I like the bright red color which tells a thief there is a lock to deal with from a distance. I think someone who wants your trailer can probably defeat any system you use, so the goal is to make it tough as possible and I think this lock does that. 287555
My second lock for my other trailer. This is an excellent solid product. It seems like it would be difficult to defeat. I'm sure it can be defeated, but probably not as fast as grabbing my shotgun and racking the slide. 498937
We have two vintage trailers. The first one is a 1948 Spartan Manor, we haven't tried the lock on it yet, and the other is a 1958 Aloha which I put the lock on it and it fit like a glove! It was really easy to put on too, so I think it should fit the Spartan just fine also. We got one for each trailer. We like the color for two reasons, one, being red, you can see it clearly, less chance of running into the front of the trailer. Two, it lets thieves know there is a lock on the trailer, and it wont be easy to steal without making a lot of noise. We were pleasantly surprised when the lock came and found it so well made. It's not light or wimpy at all. We're very happy! Thanks for the peace of mind. 238293
All products arrived on time and were the correct products I ordered. Have not had time to use the items yet, but they will perform as I expect 573881
My wife said it must work pretty good because we still have the trailer. It's true it does do what it is supposed to. I would have given it 5 stars but the paint on the lock fades pretty fast. 419359
Fortunately no one has ever tried to pry it off or otherwise remove it, but maybe that's because it's a visible deterrent. I like the ease of application, and the locking mechanism works well. The only minor issue is the color seemed to fade in the hot Texas sunlight pretty quickly. But by all accounts, it's working as it was advertised. 409325
I like the ease of use, however it doesnt fit snug. Almost looks like a couple of well placed sledge hammer hits would knock it off. Probably need something else. 554522
Mike L - 08/17/2018Looks nice, easy to install ... guess the acid test will be whether or not me rig gets stolen. 575863
Poor design. With pry bar or chisel and hammer it would be easy to break. If your trailer is worth it, spend a couple hundred and by a heavier lock like AMP. 646633
Mike L - 05/25/2019Good and sturdy! Very easy to install, takes about 5 seconds. This lock will deter the honest crook. I am happy with this purchase. 574557
Device is better than any other lock I use, I like the design, and the peace of mind of knowing that mr crook won't bother taking my trailer. Thank you 396718
Vincent - 08/15/2018im retired from law enforcement and have seen EVERYTHING stolen so this lock is another layer of defense from the bad guy. It works very easily, is strong and with it being red, it is quite a deterrent. 247256
I just received the coupler lock today so its to soon to write about quality other than it is heavy and seems to be built well. The shipping from etrailer is very quick, paid extra for the three day delivery and it was on time. I've attached it to my 2 5/16" coupler and it fit great. 388082
Fits my 2-5/16" hitch. Not particularly heavy duty, I am sure it could be broken off without too much trouble, but has served its purpose and my trailer is still parked where it is supposed to be, so it must work! 519403
Held up well through a tough winter. Too bad the paint has faded to a soft pink. Mechanically sound device. Not sure how a slide hammer would fare against the locking mechanism. 431768
Bob H - 09/12/2018This lock was chosen by me for medium security of our 20' boat. I was installed easily and will keep most who want to try to steal something like our boat away. If they really wanted to, a sledge would destroy this. Where there's a will there's a way. For our 31' trailer, I opted for another model. That would take a lot more beating to 'maybe' get off the hitch. It also costs about 8 times as much though... 421763
Jerome M - 08/17/2018Nice lock. It’s nice that there is nothing to really cut on it. Latches on nice and strong. Easy to use. You could even use a default latch lock with it. Hope it holds up as good as it looks. Will review again after awhile. 438163
I use a Master Lock Trailer Coupler Lock on both of my trailers and have had zero issues with its usability or versatility in the weather. It is very easy to install and remove, and stores out of the way in my truck. The Master Lock Trailer Coupler Lock is ready to find when Uninstaller, and it's bright red color makes it business to passersby, likely eliminating any ideas of trailer theft. A must have. 830417
I was completely satisfied with your service. Accurate tracking was available during the entire process. 830570
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