Non lockable. It also feels like cheap plastic, but if it worked I wouldn't care. Wherever I turn the key, the threaded part turns with the tip. I can turn the key, although it forces me to go back to the same place to pull the key out each time. The key spins back and forth as if doing something, but actually it isn't. I still wear it as a visual deterrent. Maybe the culprit who pumped my gas last time sees the keyhole and doesn't realize it unscrews like a spare tire cap. If he doesn't try, the fact that he looks like a cap might save me. I should have known that I would buy it from a real store where I can return immediately. I probably paid too much too.
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