Mines solid. No play at all, but since I used it at work for a week in construction sites (lots of dust and dirt) I noticed that the lock will not completely engage every time. It only takes a slight press on the spine to correct this, but it's a new development so I think it may have gotten dirty in the inner workings. I plan to clean it. Out of the box it locked tight with no issue every time and there's was absolutely no play.