Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers
(832 reviews)
Price: $43.82
In Stock
Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers
Retail:$46.05
Our Price: $43.82
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In Stock
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- All Info
- Reviews (832)
- Q & A (0)
- Photos
Master Lock Trailer Coupler Locks
- Fits 1-7/8 Inch Ball
- Fits 2 Inch Ball
- Fits 2-5/16 Inch Ball
- Surround Lock
- Keyed Unique
- Master Lock
- Universal Application Lock
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.
Features:
- Heavy-duty coupler lock deters trailer theft by preventing hookup
- Large size and heavy weight defend against attempts to break or shatter lock
- Wafer-tumbler lock mechanism resists picking and prying
- 1-Piece housing slides to fit tightly around your coupler
- Powder coat resists rust and corrosion
- Red color provides a visible theft deterrent
- 2 Keys included
Specs:
- Application: most 1-7/8", 2" and 2-5/16" couplers
- Fits standard lip, rolled lip, straight lip, surge brake, hammer blow, and UFP couplers
- Limited lifetime warranty
Note: This product cannot be keyed alike.
Instructions for Locking the Trailer Coupler
- Insert key and turn clockwise to unlock.
- Pull the ball out from the lock body as far as it will go.
- Insert the ball of the lock into your coupler's ball socket.
- Push the lock body in so that it surrounds your coupler.
- Turn key counterclockwise to lock.
389DAT Master Lock Universal Trailer Coupler Lock - 1-7/8", 2" and 2-5/16"
Item # ML389DAT
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- Did not arrive in time
Customer Reviews
Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers - ML389DAT
Average Customer Rating: 4.8 out of 5 stars (832 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.by: Erik A.05/13/2023
Great locks!! I feel a lot better leaving all three of my trailers at home with these locks on my trailers! Definitely recommend!
by: Venice03/29/2024
Very affordable deterrent that adds that little bit more security.
by: Li Zhang01/20/2019
It's a great product. It looks good on the trailer, and you can see it from very afar. And there is no way to saw it off, break it apart, or something like that. The construction is basically rounded, and there is nowhere you can find a starting point to place a saw or breakaway device on it. I have also bought different lock from Reese, and it looks wimpy, and easy to take it apart, or saw it off as some reviews have suggested. It's also easy to put it on and take it off. Just love the product. Here I attach some pictures in the campgrounds, etc.
by: George 02/09/2024
I have multiple trailers with different ball hitch sizes and Master Lock fits all of them well.
by: Alan03/19/2024
Doesn't fit securely. It seems like there are several ways to lock a trailer. Can't see how this one ever works well
by: Ben 03/22/2024
The items arrived and were in perfect condition. But the most impressive thing about eTrailer is the great service and expertise that they provide. The items I purchased could have been purchased locally, but I prefer to purchase all the items for my trailer and related objects from eTrailer due to their superior service and advice.
by: Douglas12/15/2019
Recently bought a boat and the trailer did not have any way to lock the tongue that I could see. After seeing that my stepson had a trailer with this style lock on it and seeing that it would be virtually impossible to pry it off I did some research. I have purchased from etrailer in the past and trust them to only sell the best. I ordered it and received it in a timely manner. It fits perfectly and I now feel my trailer and boat are secure. Who would doubt the Master Lock brand anyway!?!
Douglas
12/16/2020
Still working great, no complaints here.
by: Smithsonite05/26/2022
Glad to see they went back to the original design. I have a chrome colored one I bought 13 years ago that is this style, still working. About 10 years ago I bought a 2nd one for my other trailer, and it was nothing like this one - cheap plastic everywhere, could easily be defeated. Backed into it once, and all the plastic broke off revealing just how flimsy it was. Was pleasantly surprised to see Master Lock went back to this much better design. I expect to get over 10 years out of this one.
Smithsonite
5/26/2023
Working great! No issues whatsoever. I keep the moving parts, including the key tumbler well lubed with white lithium grease, so this one is going to last.
by: Greg 03/18/2024
Fit my boat trailer perfectly
by: Eric08/28/2023
This is my second order from etrailers.com and the experience was rough due to the postal service on my first order but the staff was amazing at helping me work to find the shipment and even called my local post office. I was sold on this company and now my church uses them for all our trailer needs. They are extremely good at communications and updated me every step of the way including who worked with my package and even contacting me to ask if I wanted an alternative part that would have been here sooner. I love working with this company!
by: Robert01/14/2018
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.
by: Andrey07/17/2022
Doesn't fit on a 2 5/16 equipment trailer. Made for small, lawn-mower trailers.
Sierra K.
7/22/2022
I am sorry this coupler lock did not work for you. I think the hump on top of your coupler is the culprit. I think item # C48CR would fit better.
Helpful Links
by: Mark B07/25/2023
Got this coupler lock for my boat trailer, easy to put on and take off.
So far it is working as expected, as do all the products I have purchased so far from etrailer.
by: Kim04/17/2024
It’s not exactly like we want. But for a lip roll tongue it fits. Wish they made the others for lip roll tongues instead of flat tongue…
by: Larry Simon09/23/2016
I received the Master Lock Trailer Coupler Lock that I ordered. It was delivered in just a few days just a it was supposed to. It is exactly what I was looking for. It will help detour anyone from stealing my trailer ! I am extremely happy with the lock and etrailer ! I think this is a great company with great pricing on there products ! I will recommend them to everybody and will be ordering with them again real soon ! It was an easy and excellent experience. Great customer service too ! Thanks etrailer !
by: Ed04/11/2024
It went on and off easy. Seems well built time will tell.
etrailer was great to work with and it got faster than expected.
by: Tim 04/09/2024
Good strong product. Simple to use.
by: Mark06/18/2023
Must be working... my trailer hasnt been stolen. I use every time in storage and at campgrounds. Easy to use.. Adjusts to fit snugly to coupler.. Doesnt bind up when installing or removing.. design much easier to use than some others.
by: Jimmy 11/06/2023
Universals lock, great for many applica tions
by: Mike 06/17/2023
Part looks great right out of the package... I have a 2 5/16" Ball coupler and the lock works perfectly on it... I'm thinking the lock is not coming off of the trailer without the key... Couldn't be happier with the lock...
by: brandon 08/25/2016
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.
by: Delmer05/02/2024
Great easy to use
by: Michael11/19/2019
Nice tool, I like that it will adjust easily for different depths so it will fit more than one size trailer tongue. It pulls in snug and with a couple firm smacks with a 2 pound hammer is still works just fine.
by: Perry 04/18/2024
Went right on my hitch, Thank You
by: Mike W.08/21/2019
I installed this trailer lock as soon as I purchased it. All I have done is spray the lock with WD40 a couple times and the lock has protected my favorite boat with NO problems at all.
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Show More Reviews
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view full answer... - Replacement Keys for Master Lock Trailer Coupler Lock 389DATIf you know the key number that came with your Master Lock Trailer Coupler Lock # ML389DAT then all you need to do is order the Replacement Key for MasterLock Coupler Locks # MLK1, and be sure to input the correct key number on the page prior to ordering. If you don't have a record of your key number then you'll either need to call a locksmith to make a copy for you, or you'll need to order a completely new coupler lock, and you'll want to record the key numbers once you get it.
view full answer... - How to Get a Replacement Key for a Master Lock 389DAT Trailer Coupler LockFor a replacement key for your Master Lock Trailer Coupler Lock # ML389DAT, you will use the Replacement Key for MasterLock Coupler Locks # MLK1. You just need to put your key number in the key number box on the Replacement Key for MasterLock Coupler Locks # MLK1 page.
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Do you have a question about this Trailer Coupler Lock?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Edited by:
Lindsey S
Video Edited:
Jacob T
Video Edited:
Chris R
Installed by:
Cole B
Installed by:
Aidan B
Updated by:
Danna S
Updated by:
Wilson B
Written by:
Alexander C
Video by:
Samuel H
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Jenny N.
3/22/2024
I hate to hear that you are not happy with the coupler lock. Would you be able to send a picture or describe in more detail how it is not fitting for you.