Thank you so much for the through discussion of the mechanics of this fascinating device. One thing that is not clear to me though, especially given the strength of these magnets is how these magnets are not a danger to items such as credit cards. What is it in the construction that allows for these magnets to hold together and yet safe from erasing other magnatized items?
I'm a jewelry designer interested in using magnets for connections within pieces using leather and am wanting to find out how to use them without causing any negative effects.
Would love to hear a little bit more about this!