Instruct: Classify the given Amazon review into its appropriate rating category
Query: Key jams

After only using this lock a couple of times, the key will only turn part way, so the lock can't be unlocked. It took me about 10 minutes before it turned the first time, and now it's doing it again. If I can't trust a lock to open, I can't use it. This is worse than useless, since your lock could very well strand you.