Mechanically and functionally well. The specified set of keys etc. from div. Articles on the net is confidently a joke ... By the time one has assembled the thing pops up and fall a the contrary, because indeed no hook o. Ä. In the box. That is why "only" 4 stars. Since there's but 'ne simple remedy: Just one of these wonderful Neodymium magnets (. Eg 10mm³ cube) tuned paperboard to the rear wall and / keys with key ring since.