Recommended Coupler Locks for a Enclosed Trailer  

Question:

Expert Reply:

Welcome back David and congrats on your new trailer. I checked Amera-Lite's website and it looks like their M series enclosed trailers have standard couplers with a 1/4" pin hole just below the latch.

I recommend one of our etrailer Coupler Locks like item # e98888. I have listed our options below by their usable span. The span is the width of the coupler you'll be securing. They all measure 1/4" in diameter.

7/8" Span item # e98889
2" Span item # e98886
2-1/2" Span item # e98887
2-3/4" Span item # e39PR
3-3/8" Span item # e98888

These locks will definitely keep your trailer secured to your truck while you're eating or relaxing after a long day in your hotel room. They can also be used when you store your trailer.

If you don't end up having a pin hole, I'd like you to send me a picture of your coupler directly to the email address you receive this response from.

What do you plan on hauling with your new trailer? Feel free to answer this and throw in any other questions you have, where it says Add Comment.

expert reply by: Jerred H

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Coupler Lock
(click to enlarge)

Coupler Lock
(click to enlarge)

Coupler Lock
(click to enlarge)

David R.

11/2/2026

Thanks Jerred! I will be picking up my new trailer by the end of the week! Hopefully it has that hole so I can use the locks you have recommended!

Jerred H.

11/2/2026

@DavidR You're welcome and that is super exciting! If the pics on their website are accurate those couplers definitely have pin holes for locks. If not we will find another solution to protect your investment.

Dave S.

11/3/2026

I bought the coupler for security of course. They work great. I live in a rural area. So theft is low here. My main purpose was to get the couplers with same key. I have five (5) trailers. I got all keys keyed the same with the different sizes that etrailer offers. Worked our great. One key for all my trailers.

Jerred H.

11/3/2026

@DaveS That is great to hear Dave. Glad you were able to get all your locks keyed the same and you don't have to worry about your trailer's walking away. Thanks for taking the time to come back and share that feedback with us.