I give this product two stars for two reasons: First, the packaging is so tight that it is difficult to open. I used utility knives, scissors and a razor. In doing so, he cut his hands. I don't know why everything has to be sealed in plastic these days; that's ridiculous. Wear gloves! Bought two, one for each tire. I have a handcrafted drop trailer and it is beautiful. I don't want it stolen. Came with the exact same keys. I don't know how secure it is... If all these locks have the same key. That got me scratching my head. So if it's a master key, any person who has one of these tires on their van or trailer is vulnerable to theft. Overall, the locking mechanism works very well and fits my tiny tires. It looks like it's secure enough, I haven't tested it yet. I think it might be a good idea for a company to put separate locks on those particular bars and it might actually be useful to be able to sneak into the packaging as well. Another thing that really worries me; there are no instructions... Not at all! We should all know how to do these things, I didn't know.