TRIMAX 5/8" Dia. x 3-1/4” Span - Trailer Receiver Lock (Resettable Combination) - Combination Lock Trailer, 5/8" Pin

Tired of all the keys on my chain and searching for the right key when securing my bike rack to the receiver I knew there had to be a better way... and this fit the bill perfectly! It was a snap to set the combination to the four digits I wanted and it takes less than a second to install it and slide the rubber cover over it while in use. Only a few seconds to open it as well. It's sturdy enough to hold a bike rack (or small trailer) in the receiver so that's all I expect. While I don't doubt someone who really wanted to break it could do so, it would be easier to cut the cable locking my bike to the rack. (But as rare as my bike is on the rack unattended, I'm not worried when I make a quick trip into the grocery store while parked in plain sight.) But most important to me is the convenience.

MUCH easier to use than keyed ones. Have gotten tired of trying to keep track of keys. As far as the item, it works flawlessly. Tge plastic shroud keeps the digital locking wheels clean.

First, why are so many people having trouble setting this lock? There is a YouTube video for the folks who prefer "visual," ie. can't read. Yes, there are two minor errors in the written instructions: 1. In the blowup diagram at the top, "Fig. 1", "(H) Pin" is actually "Pin (F)" in Fig. 2 of the instructions. 2. In Fig 3 of the instructions, "Red Set Marks (C)" are actually black, as is "Guide Point (A)" Your welcome but figuring this out was not genius work. The pin itself may be steel but the lock body is "caca" metal; zinc or pot metal. No on would try to pick this since destroying it with a hammer is so much faster. I would advise against using this lock to protect an expensive hitch but to protect my rust old trailer ball, it is just fine; the only idiots who would try to steal that would probable use the wrong end of the hammer.

Perfect fit for 2026 Ram pickup 2.5” receiver. Follow directs, set your own 4-digit combo, done with keeping keys. This lock has just enough room to lock on this 2.5”, leaving very little side to side slop while in the in hole. Definitely recommend. And, if bought under Amazon Prine, if it doesn’t fit or is defective, return it.

I have a 2016 Ram 2500 HD Cummins. I use a GenY 303 Drop Hitch. This pin works in both the drop hitch and the receiving end of my truck with the adapter sleeve. I was weary about ordering this as most Heavy Duty trucks have a larger receiver that require and adapter sleeve to work with most hitches. My overall width is about 3.5 inches side to side on the outside of the drop hitch, and this pin fits just right with no slack,and with all four rings in place, which is how I like it. I ordered one just to make sure it would work before I ordered two more. Now that I have confirmed it works, I'm getting two more today. Combination is very easy to change and took less than 5 minutes to learn how to do it. I prefer using this pin over having three key locking pins, with three different keys.

I have not used it on my hitch yet, but so far everything seems to be working just fine. When locked, it's pretty sturdy. The provided sheath/cover is flexible and strong, and should protect the lock from the elements for years. Love the convenience of not having to carry yet another key. Resetting the code might appear a little more complicated than it really is, but once you know how to do it, it's straightforward: Basically once unlocked and the bolt removed, you can twist open the lock mechanism; then remove all the lock rings (it's ok to just let them fall out). Then you'll need to line up the black dots on the core, then replace the rings per the code you have in mind, then put back the large locking nut. That's it. I cannot attest to its road worthiness, or its longevity, at this point but I'll soon need it on my new hitch carrier. I'll update if there is any new discovery.

The lock is fine and convenient. But I have purchased two of them, and despite having the cover on it, both locked up with debris and oxidation. I am not unhappy with it, but I do wish the materials were better able to endure Indiana winters with salt. I am trying a new brand (just ordered) and will see if I like it better. If I come back, I will probably plan to remove it every month or so and use a sonicator to clean it up to avoid it getting stuck (again!) while locked. Perhaps anti-rust/lube like Eezox or just packing with lots of grease may help. Just be aware that it will seize up if left alone for a few months in icy winters! But it is convenient!

Exactly as advertised

水に濡れると固着します。金属疲労早いと思う。 自転車のチェーンロックの安い物感がある。

Took a bit to figure out how to work the combo to your own number but works well. Nice fit and have no complaints. Like not having to worry about more keys.

The photos shown are after 1.5 years of usage. This lock has been on my hitch at all times and even through Canadian winters where my area uses salt on the roads. I'm very impressed with how minimal the rust is on the lock. I never had an issue with unlocking and removing it from the hitch. Lock is easy to set and the black cover is nice for that added protection from the elements. I added a touch of rust proof spray in the locking mechanism occasionally just to be safe.

Nice lock just wish it was stainless. Combination is simple to change and the rubber cover seems to want to stay on. Had it on for a few weeks I imagine in a few months it will be discoloured and oxidized but for the price a good locking pin without having another key to lose

Honestly for a locking hitch pin, it's great. I no longer have to worry about carrying a key.