I bought this to put a lock on my room because I don't have one and I'm in puberty, so I don't want people entering my room without permission. However, I was told that if I put a lock on my door, I would have to leave the house, so I'm selling it. It was discovered the moment it arrived, so it's new and unopened. Please buy with confidence. Can be used for sliding doors and windows. For preventing mischief by babies, cats, dogs, etc., and preventing parents from entering, etc. Sliding door lock Window stopper Baby guard Baby Cat Dog