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TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers

TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers

Item # 3481213
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Trailer Coupler Locks
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TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers Fits 1-7/8 Inch Ball,Fits 2 Inch Ball,Fits 2-5/16 Inch Ball 3481213
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This coupler lock helps prevent your trailer from being stolen when you're not using it. It's super easy to install. Simply insert the ball into your coupler, connect the shackle, and use the included key to lock it down. Fits most couplers. Lowest Prices for the best trailer coupler locks from TowSmart. TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers part number 3481213 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (37)
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

TowSmart Trailer Coupler Locks - 3481213

  • Fits 1-7/8 Inch Ball
  • Fits 2 Inch Ball
  • Fits 2-5/16 Inch Ball
  • Surround Lock
  • TowSmart
  • Universal Application Lock

This coupler lock helps prevent your trailer from being stolen when you're not using it. It's super easy to install. Simply insert the ball into your coupler, connect the shackle, and use the included key to lock it down. Fits most couplers.


  • Trailer coupler lock protects your trailer from being stolen when it's not in tow
    • Ball fits most 1-7/8", 2", and 2-5/16" ball couplers
  • Multiple locking positions accommodate most coupler contours and latches
    • Fits surge-marine couplers, latch-style couplers, and couplers with an extra ring
  • Spring-loaded lock automatically returns key to locked position
    • Includes 2 keys
  • Bright red shackle provides a visible theft deterrent
  • Durable steel construction with corrosion-resistant chrome finish


  • Application: 1-7/8", 2", and 2-5/16" couplers
  • Weight: 2.5 lbs
  • 1-Year limited warranty

Coupler Lock

1213 Tow Smart Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Couplers

California residents: click here

Video of TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for TowSmart Trailer Coupler Lock Review

Randy: Hey guys, it's Randy here at Now, trailers are becoming more and more common, especially camper trailers. Seems to be a bunch of them out there and trailer thefts are also something that we have to be concerned with. Today, we're looking at a TowSmart trailer coupler lock. This is a really easy to use coupler. Clips right on and it fits just about any type of trailer that's out there.

We've used it on several different trailers, whether that's surge marine style couplers, regular just latched style couplers. Even the couplers that have that extra ring that come up and around. It seems to work out really well on it. You'll see it uses a loop style that comes around the bottom of your coupler in a ball that fills in the area here. Now, the ball's only about an inch and a half, so inch and seven eighths, two inch or two and 5/16ths inch.Couplers, you won't have any issue using it on and as long as the lift's not over four inches, it's going to slide right up on him.

We've got our top that's going to come down and over. You can see this is brightly colored. That's to help alert people that you do in fact have a lock on your trailer and it's not going to be an easy target. A lot of times, if somebody is trying to take something, they're going to look for the easiest thing that's available. There's one with a lock and one without a lock, they're probably gonna look at the one without the lock first.

It will come with two keys and something I like about it, it does say, "TowSmart" on the keys so you're not going to be searching for the right key when you're trying to unlock it. Then that's simply going to slide in.Loosen it and that comes right off as well as the bottom portion. Now, the two keys are important. I've lost my keys before. A lot of people have.

Being able to have a backup either stashed there at home or somewhere else where you know where it's at, it'd be really important to make sure you can get connected and get to enjoying your trip. To help it work with different size couplers as far as height, you can see we've got a couple of different positions there to choose from as we bring that down. We don't want it to be too loose so it's nice that they have those little incremental kind of levels there so we can get it as tight as possible, but they're so close that it's not going to leave it real loose. You can see, not a whole lot of play there. Now as far as quality, I think it's going to last for a very long time.I don't think corrosion's really going to be an issue. The red portion's powder coated and then we've got chrome plating around the rest of it here. This would definitely be a coupler lock I would own. I think it's going to do the job and it's very simple to operate unlike some of the other ones out there. If you're in a high crime area, if you're really concerned about security, you could pair this with the etrailer wheel clamp block that we have. I think that's also a really good way to prevent theft.This one remains a little bit more visible since it's right up here at the coupler, but that wheel clamp will also have a high vis yellow finish and I think this is an excellent deterrent. You pair it with that other one, I really don't think anybody's going to want to mess with it. Now, I also really appreciate the ease of the use that we get out of it. Regardless of your coupler, as long as the lip isn't wider than four inches, it's going to be a good choice. See, it's just going to slide up on there. We bring the top portion down and on. You can see once we've done that, it's going to be nice and secure. You're not going to be worried about anybody being able to attach to your trailer and get away with it.

Customer Reviews

TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers - 3481213

Average Customer Rating:  4.6 out of 5 stars   (37 Customer Reviews)

This coupler lock helps prevent your trailer from being stolen when you're not using it. It's super easy to install. Simply insert the ball into your coupler, connect the shackle, and use the included key to lock it down. Fits most couplers.


yes i have bought alot from etrailer and this lock i did have 3, great lock, so i needed another so no doudt what i was getting, so i placed the order , now this is y its a 4 star, so much time had passed since i placed the order and not a call or message from etrailer that it was on back order, at that point when i called them they offered me another type of lock , very nice of them but i wanted all my locks the same, my wife says im OCD but im not i just retired from Army and everything has to look sharp and my home and property does just that , i started getting updates on my order after i place the first call, u can look at that several ways but i see it as , it is what it is, things happen , the only thing i say is this, the keys are made with super soft material so keep them lubed cause i didnt and broke a key off inside lock, but now i have my can of lube there with all my trailers to keep them in easy working order

still awesome, a few s of oil and wipe clean and works like new, I wont be without this lock unless they stop making them
Bert - 05/17/2022


I own 4 trailers and have had many locks, i ran across this lock and bought one, i was excited that its the one, so i bought another , then last week my big trailer was loaned out and had such a hard time getting the old lock off and i keep them lubed but after sitting for 3 months under the barn it still locked up and had to ply it off while holding the key, so that same night i pulled up etrailer and ordered 2 more and upon getting them i right away changed them out, great lock, for myself great lock, yea there r better ones out there ive seen i guess, i wont ever know if they r better cause ill NEVER
paid that kind of money for one, these r great and i live out and they know what they will get if trying to steal my trailer, i honestly beleive i can give my word that these r awesome locks , hope u will try one, and etrailer has always got my order out fast, great company

product is best , have them on all my trailers , and i must say if u could make the key stronger than u should never need another lock , the key is awful , it will bend, or break but if u take alittle time , like 10 seconds ever so often and 3-4 s of oil on the key and into lock and work it around u will never have a problem, thats just what i do but other just want to be negative, and say key broke, yes i bet it did if ur thinking it nevers needs alittle WD40
Bert P - 07/18/2021


I like how good this works its easy to use and works great

I like them well worth the money
David s - 03/06/2022


Fits like it should. Very fast delivery


Bought this for my rv trailer and it would not fit securely no matter how it was installed it would simply slip out of the hitch. I tried it on 2 other trailers with the same result.


Nice value. Good product for the price. e Trailer is my go to source for value.


Adjustable lock fit well and snugged up tightly on my trailer hitch coupler. This is very good for couplers that do not have a lip on them which most other coupler locks clamp on to the lip. Locking mechanism is easy to use. The red color on the large top portion I think helps thieves think twice before even approaching the trailer since it looks like it would be a lot of hard work to remove to steal the trailer. Great product.


Looks like a good product.
You guys
did a great job with timely shipping. Thank you!


After owning a year this seems to be a pretty durable lock. I love the design as well, easy to take on and off.


Key broke off in lock. Weak metal in key. Not very happy.


I like the product. Exactly as described. Fantastic service from etrailer as usual.
Molly and the gang are great? will continue to do business with them.


The product is of good quality and construction. Works exactly as advertised. I am
Happy with this purchase!


Works great. I ordered 2, one for each of my trailers. Great fit.



Good product!



Very satisfied with product




Looks to be a fairly strong device.


Works great!





Show More Reviews

See what our Experts say about this TowSmart Trailer Coupler Locks

  • Are There Replacement Keys Available for a TowSmart Coupler Lock
    I have a solution for you, but the Tow Smart locks like the TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers # 3481213 cannot be keyed alike. For that reason, unless there is a number somewhere on the lock or key, the only solution would be to replace the lock. If you have a TowSmart # 3481213 you can use that lock as a direct replacement, but I've also linked all of our TowSmart locks to this answer for you to check out as well.
    view full answer...
  • Trailer Coupler Lock That Fits A Trailer With A 2" Ball Coupler
    Yes, the TowSmart Trailer Coupler Lock # 3481213 will fit your trailer with a 2" ball coupler. This lock will contour to fit most couplers and latches to fit most 1-7/8", 2", and 2-5/16" ball couplers.
    view full answer...
  • Solution for Replacement Key for TowSmart Trailer Coupler Lock
    It sounds like you are looking for a Y669 replacement key for the TowSmart Trailer Coupler Lock - 1-7/8", 2", and 2-5/16" Couplers # 3481213. Unfortunately, replacement keys are not available for this lock. The only solution would be to replace the entire lock which comes with a new set of keys unique to that lock.
    view full answer...
  • Tow Smart Trailer Coupler Lock Place of Manufacture
    The Tow Smart # 3481213 is manufactured in China. If you're looking for a similar lock that's manufactured here in the US, I'd recommend theBlaylock # BLTL-33. For a compatible padlock, I'd recommend the # ML40D from Master Lock. I've linked to a product demonstration video featuring the Blalock EZ Lock Coupler Lock.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Tyler C
Edited by:
Tyler C
Employee Jacob T
Video Edited:
Jacob T
Employee Randy B
Video Edited:
Randy B
Employee Matthew S
Updated by:
Matthew S
Employee Zach D
Video by:
Zach D
Employee Erin H
Written by:
Erin H

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