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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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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 etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (9)
  • Q & A (1)
  • 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
  • TowSmart
  • Surround Lock
  • 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 Review of TowSmart Trailer Coupler Locks - Surround Lock - 3481213

Randy: Hey guys. Randy here at etrailer.com. Today, we're taking a look at the trailer coupler lock from TowSmart. This is going to be a very cost-effective way to get your trailer secured. Just keep it protected, Keep that investment protected, so you don't have to worry about it disappearing whether you're storing it as a storage lot, storing it at home, whatever the case may be.When we want it, we want to use it, right This is going to be a nice high visibility coupler lock you can see. Helps to deter theft as much as it does stop it.

Basically, anytime somebody's looking for something to take, they want the easiest option. By mounting this on there and having it up front to where it's very easy to see, this can deter a lot of people from trying to get to your trailer and trying to get it. take it.Generally, when they see something like this, they're just going to go on to some kind of easier targets so they don't have to deal with it. Now, this is going to work with inch and seven-eighths. It's going to work with two-inch and two and five-sixteenths.

It's got a good, wide range that it's going to work with, and I can't think of a whole lot of couplers that it's not going to work with. I'll show you here.We're going to have two keys or key to lock. You can have one for your lock and then one for backup. That's just going to slide off there. Going to take it down just into its first locked position, you can see that gives us a really nice, wide area there.

We have a real thick coupler. It's just going to click measurement and see what that's going to be. About an inch and a half there. Turn it so you can see it. See Right out to about an inch and a half.We can bring that down.

See, there's got plenty of adjustment. It comes down to, there might be an eighth of an inch in there, between the top and the bottom. It feels really nice and heavy duty. Of course the red shackle here we covered, that's high visibility. The rest of it's going to have a chrome finish on it. I like the way it works. The lock works really smooth. There's no catching. When you turn the key, you don't feel any un-alignment issues or anything like that. Turns really well. Spring loaded so the key's always going to return to the lock position for you. As far as width inside to inside here, it's really going to be your major concern to make sure it's going to fit around your coupler. Again, I've dealt with a lot of the trailer couplers and I really can't think of one this isn't going to work for.Inside to inside there, we're looking at four and one eighth of an inch and if you're interested, the ball's going to stick up from the base right here, about an inch and three quarter or so. All in all I think it's going to be a really easy way to secure your trailer. Again, very cost effective and it'll just keep it where you've parked it. You're going to have to worry about it being moved here, moved there. You not know where it is. I like the keys. They've got the rubberized texture there with a few raised ribs here. Not ribs but little dots on it just help you get a good grip and it's very accessible. You can see that lock being right there on the front, easy to get to is a big thing in my book. Some of these coupler locks you have to get in underneath them and kind of. Anyway, it's just harder to see the keyhole.It's harder to get to it. Harder to gain access to it. Just like any trailer coupler lock though, it could be bypassed if somebody really, really wants your trailer. No coupler lock offers Fort Knox type security, but it's certainly going to be a great way to protect your investment. I would definitely own this. I already have a coupler lock, but this is a really good solution and I like the fact that I could move it from trailer to trailer. Also, if we get out to the campsite, we're sitting around and we want to go for a trip, we want to go for a ride, something like that. We don't necessarily want our trailer to remain there unlocked. Great way to secure it. I'd definitely only one. I think you'll like it.

Customer Reviews

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

Average Customer Rating:  5.0 out of 5 stars   (9 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.

- 3481213

Good product! 875197

- 3481213

The product is of good quality and construction. Works exactly as advertised. I am Happy with this purchase! 869770

- 3481213

Looks to be a fairly strong device. 866849

- 3481213

Works great. I ordered 2, one for each of my trailers. Great fit. 852933

- 3481213

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 844865

- 3481213

Very satisfied with product 775248

- 3481213

Works great! 758990

- 3481213

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. 752777

- TS84FR

Review from a similar TS Trailer Coupler Lock in Trailer Coupler Locks



Ask the Experts about this TowSmart Trailer Coupler Locks

  • 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:

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

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