being a welder for almost 30 years. I understand alot about metal, and what makes this lock good. I've hardened steel myself. The same way they do with this lock. It raises the hardness of the steel, where it's harder than drill bits and saw blades. I use grinders everyday and I know how difficult it would be to cut this off. There is a YouTube channel called the lock picking lawyer. He is considered the best at picking locks. He actually had to custom make picking tools in order to pick this lock because there were no commercial pick tool available for this type of lock. It felt so good having this on my rv. I feel so much better now. Especially since my brother in laws rv was stolen 3 months ago.

Great product, heavy locks, they work great. Great customer service!

Received my order within a week. No issues with transaction, shipping nor delivery. Item arrived undamaged, as I expected, no matter how badly it was handled. This thing is MASSIVE!! It certainly looks the part. Now, I won't know how effective it really is at deterring would-be-thieves, until someone tries. The mere sight of this lock should discourage anyone from trying to break-into it.