We really like our Altor trailer lock. Compared to other locks we have seen, this is by far the most robust design. Any lock can eventually be defeated, but this lock will out survive any other I have seen. I managed to lose a set of keys that contained the key for my Altor lock. I was able to order replacements that arrived quickly and worked as they should.
I purchased a 2000 series the lock is very well made heavy, doable, weatherproof, I think it is the champion of locks. It will tell your neighbor damn I got to get me one. And it will tell the thief ain't no way, I have total confidence in this lock.