* Disclaimer: OveReview is reader-supported. We earn commissions from qualifying purchases
Shoreline Marine Trailer Coupler Lock

Shoreline Marine Trailer Coupler Lock

Shoreline Marine Trailer Coupler Lock
$ 5.47

Score By Feature

Based on 1,642 ratings
Sturdiness
8.08
Easy to use
8.32
Value for money
6.76

OveReview Final Score

How Our Score Is Calculated

Product Description

Reduces the likelihood of theft
The corrosion resistance of this material
A screw type of fastener
This is made from stainless steel
A set of two keys is provided

Questions & Answers

Shackle/lock pin diameter how much does it measure? Can you tell me what it's size is (the width of the jaw)?

The pin of the lock is 1/4" in diameter the largest open jaw is 9/16" in width and the maximum is 3/4" in diameter.

Do you have the ability to order additional keys? A set of pairs would be nice to have at home just in case one gets lost. ?

I would suggest something else for you. While you can get additional keys made, I am also suggesting that you do In the case of the 2 pack trailer coupler lock set, there are four matching keys included. If you buy a single lock, you'll still receive two keys and you'll only need one key for locking and unlocking the coupler. The first one can be kept on the key ring of your tow vehicle, and the second one can be kept at home (just make sure it is labeled so you do not forget what it is for later).

Can you lock a ball that is 2" in diameter?

There is a lock on this coupler, which locks the lever on the trailer where the ball fits, so it cannot be inserted into the trailer. If the ball is at the bottom of the mechanism when it is locked, it does not lock the ball.

I wish to order two locks that are keyed alike. How do I specify this? "2 pack" doesn't appear to be an option?

There may be a need to carry two keys if you buy two. The purchase of keyed alike keys does not seem viable.

Selected User Reviews For Shoreline Marine Trailer Coupler Lock

With a crowbar, I was able to break it in less than a minute
3/5

Due to the loss of my key, we desperately tried to break the lock with a crowbar. It took about 15 seconds. The site isn't at all secure.

Fernando Gutierrez
Fernando Gutierrez
| Jun 17, 2021
I like the design of the key, but the locking mechanism is not very secure
4/5

I like the idea of the pin not being exposed, and I like that this works well. It still worked one time when I accidentally inserted the wrong key (the only other yellow key I have in my bunch, which is from my mail box)! While I do agree that it worked a bit rough at first, I originally thought I needed some grease, but NO, I was using the wrong key. While I am a bit concerned about this occurrence and wonder whether it has happened to anyone else, I think it's a little discouraging to the more honest among us.

Armani Woodward
Armani Woodward
| Mar 30, 2021
This works, but there is a catch
3/5

The device was difficult to operate. The key would not fit, it twisted and twisted. There are many twists and turns. Then, you will need to turn the key to remove the lock after finding out which direction to insert the key. Regardless of the weather, I found this lock to be effective. The padlock I used is stronger and the key is keyed Despite its small size and narrow ubolt, the narrow type slides through my 2 5/16" ball lock very easily and is easier to disassemble than this one. This is what you need to do if you receive it In addition to working, it is visible, bright, and brightly lit. I'll be able to afford a trailer with a gold lock if I wave that flag. Here's a hint Unscrew the key until one side of the lock twists enough to remove the lock. Simply half-turn the key up to the locking mechanism until one side becomes loose enough to open the lock. It locks with a twist, turn the key eight times, then it unlocks. The old keyed alike locks will still be in use until a new set In the near future, I will move it to a small boat trailer that has never been stolen or locked.

Louis Ewing
Louis Ewing
| Sep 23, 2020
Initially, it worked fine for about 10 cycles of lock/unlock, but then it wore out internally, so the keys wobbled around inside it would jam each 90o and require a lot of wiggle action to keep I was able to unlock the gate and hitch up after having worked my way through it
3/5

I am returning this one for a replacement so I can try it again at least for a while. If the second one works well, I will update this review and conclude it is a single defective item.

Waylon Cook
Waylon Cook
| Nov 25, 2020
I don't know
4/5

Against my bicycle, there is a small pellican case knockoff in which I keep a spare tube and small odds and ends, and I use this lock to keep opportunistic people at bay. 2) anything more than a quarter turn is difficult to operate when you have multiple keys on your keychain. In order to remove the lock, it takes several full turns to open the jaws enough to remove it thus, it is difficult to use. 2) It is heavier than a suitcase lock, but I would not call it My basic needs are met by it, although it seems that a couple of blunt blows with a hammer would be enough to bust it off. Would I think The lock I have here is not terrible, and it does what I need. Having learned what I know now about the design and the multiple turns required to open it, I would probably start looking at alternative designs to see if there is one that could possibly be used better for me.

Andre Perez
Andre Perez
| Mar 28, 2021
While the key is a strong link, the sturdy part is fragile
3/5

These were purchased for the purpose of securing my trailer, and they are very simple to install. This is a very sturdy thing. As for the only concern I had, it gets dirty or for any other reason the key becomes hard to turn, and I am afraid I might tear off the head and leave the rest inside Do you know what to do if that happens? Sometimes a key head is ripped off due to a dirty lock, corroded cylinder, or old lock. A couple weeks after getting a second trailer, and during boating season, the price of this item almost tripled, leaving me feeling taken advantage of. Hence, I purchased the Trimax TMC10 Coupler / Door Latch Lock, which I think is much better than the original. With the round key on this model, this model's weak link is fixed by using an advance technology design. My shoreline one may need to be replaced when I have a chance. It is recommended that you choose the Trimax model rather than that of shoreline.

Hakeem Terry
Hakeem Terry
| Mar 30, 2021
The product is exactly what was There are times when the key slips out of the lock
4/5

The product is exactly what was It is possible that the key will slip out slightly as you turn it to unlock, but it is best to make sure the key is fully tapped in before you take action. As of now, there are no other issues to report.

Leonard Sloan
Leonard Sloan
| Sep 17, 2020
A pain in the butt, but a secure feeling
3/5

I feel like this locks the trailer relatively well once you get it on there. The fact that it's so tedious to get on and off *with* a key is exactly the reason that you'd expect (hope) that it would be nearly as difficult for thieves to gain access. This lock, since it is common and on the shelf everywhere, will likely end up with me breaking off the key trying to turn it, then destroying it with any tool at hand. Since this same style lock is so common, I wonder if a more expensive one would work better.

Everleigh Gardner
Everleigh Gardner
| Jun 24, 2021

Related Products For Shoreline Marine Trailer Coupler Lock