Master Lock Receiver Lock, 1/2 in. and 5/8 in. Swivel Head, Weather Resistant Trailer Coupler Locking Hitch Pin with Keys for Protecting Trailers, RVs, 2866DAT

Works perfectly for the hitch and blue ox on our motorhome.

My first time using something like this. As you can expect from master lock, quality is rock solid. Has good weight to hold the pieces together. It seemed to stick a little the first couple of times I used it, but that could be due to my experience with this kind of lock. Overall worth the price for protection.

This is a must have to secure your trailer or wheel chair carrier. Works perfectly.

Most of you will already be aware of (and probably already tried) this "trick", but it's about all you can do if this lock has frozen itself to your trailer or hitch. Just squirt some WD-40 liberally into the keyhole and wait 20 minutes. If possible, rotate the lock so that the keyhole is up so the lubricant doesn't just drip out while you're waiting. The hard part will probably be inserting the key all the way so that it will turn. Work it firmly back and forth until the key is fully seated, and then cross your fingers and turn. From my experience with a number of these locks, if you can push the key all the way in, it WILL turn. If you've successfully gotten this far, then hopefully the internal locking latch is not frozen and will release. If not, try tapping the lock with a hammer or screwdriver handle.If that doesn't work, repeat and let sit overnight before trying again. I prefer WD-40 for it's water-displacing properties, although 3-in1 or machine oil will also work. And if that doesn't work, it's unfortunately time for a cutting torch.Now for my review. I used to tow and use boats at work almost on a weekly basis, and have also used these locks for my personal vehicle and watercraft. The most important thing I can tell you is that these are good locks, but they are NOT weatherproof locks. If the lock is going to be somewhat sheltered under a bumper securing a receiver hitch, then it will be all right for at least a few years. I had one on my work truck for more than 5 years, but it BARELY came off when I finally needed to swap out the ball mount. I now use plain, regular receiver pins on my receiver and trailer and swap them with these lockable pins when heading to the public ramp. I don't boat as much as I used to, and if I did that would be a routine inconvenience. If you boat regularly or are using these in an unsecured location, then I would suggest giving the lock a squirt of WD-40 every few months and just plan on replacing it every few years. I continue to stick with these because I'm not aware of a better product, and because I've generally had very good luck with Master locks. Their padlock-style shrouded trailer locks last a decade. I wish this receiver lock was that good.

It's plenty long enough for a regular hitch, locks and unlocks very easily, ive used it for over a year now and still looks new, i like the curved key hole makes it alot easier to unlock.

Perfect fit in the tight space on my Infinity QX60 with factory tow package.

Perfect design. This is the 4th pin lock that I have purchased over the years and the design is the best by far. By having the keyway facing out instead of off of the end is much easier to operate. When the keyway is off of the end it is cumbersome to lock as you really need a third hand. The key is also more robust than a typical key of this style.

Excelente