Sluggish Castle

As I conclude my bike has regularly before the university (there are lock and bike in the rain), it was important for me to have a sturdy lock, but after less than 6 months was the catch always sluggish.
Finally, it no longer took the keys to so that I had to break the lock forced moderation, what about purling just works in this castle, because although the chain links but are not even hardened the covert of plastic final mechanism.

However, because the castle is quite cheap and still a "deterrent appearance" has, and as mentioned has been exposed to wind and weather, there is always way more 2 star.