not as strong as I would think... :(

These magnets are typically stronger than the larger brother to it.  These particular ones however are not as strong, I had to use two.  But they are small enough to use two on my tiny 1 1/4" glass kitchen frames.  They don't weigh a lot because I used the typical 1/2" round magnets before and they hold up fine with even more power to hold three small notes to the frig.  These were 6mm and so two had to be used to support my tiny glass frig frames. :(