Edit: I see you're talking about the hitch itself. I use a locking receiver pin from andersen. I had the reese version before and it didn't last long before the lock stopped working. It also shimmed up to the right size which isn't as strong. Solid pin gives me peace of mind.
I use a bitch lock. But also use a cable lock, thru the spokes of the trailer tires so if someone smashes off the hitch lock the cable lock will keep the trailer from being towed But if someone is determined. They will steal it
Amazon link?? :-) Gotta be an intricate little dude of some sort...and risky!
Flower Mound, TX email@example.com
The old- 2001 Jayco Qwest
The new- 2018 Jayco Eagle 324BHTS
2018 F-150 Ecoboost
Trimax lock is affordable. Not much more to say about that. Second, when compared against competitors of the same style, this one is among the best. But to be clear, that's not high praise. What I'm sayin is, if you have to buy a budget trailer lock, this is among the best in its category.