I have a cheap locking hitch pin that lived in my old 2004 F150. It's a no name unit and did the job. Only had one time where road salt almost got it, but I managed to get it loose. It's worn pretty bad now to the point I wouldn't use it if I could. Current truck has a class 5 hitch and I needed a new one, ordered "Deadbolt" brand from Etrailer. So far so good, but I really only use it to lock a shank in the hitch once in a while. My biggest issue in searching was trying to find one that advertised some kind of weight capacity, and there weren't many. I don't tow a ton of weight with the receiver, I have a 10K dump trailer, everything heavier has been gooseneck or 5th. Lately I have just used the standard pin and leave the shank in the dump trailer toolbox when I'm done. Everyones shins thank me!
2013 F350 dually
2015 Palomino Puma 351THSS Premier Edition
2015 Nights camped 15
2016 Nights camped 5