The magnets are wirklkich well, in terms of strength. So you can take the help of a thumbtack already a bunch of up to 7 A4 sheets hang on the wall without that they eventually land on the ground. However, they are very fragile, which I unfortunately had to find on the first day. Once was not paying attention and "zusammenflitschen" the magnet can and a corner of a magnet jumped out. Too bad, but function nevertheless is still wonderfully :-)