These are nice tray tables and are pretty stable, but as a number of other people have said, when these were made, they thought it was a good idea to wrap the top in some kind of fairly sturdy, protective, see-through something, like heavy cellophane, and then attach the legs and hardware underneath the tray top over the covering.  You can only remove the covering with scissors and at the edges of the various wood pieces under the tray top, with a mat knife, which is really bizarre.  It makes me wonder about the working conditions.  I liked the tables enough to keep them, but it's so bizarre and you really can't get all the covering off underneath.