Super attachment, but not a toy!

Wow! They have power! If you want to attach anything reasonably unobtrusive, but surely: Voilà, here is the solution! These magnets are really small, but keep both on magnetic metal surfaces, as well as each other per se, bombproof. Very important: these things are not a toy, because when two come together it, you should have no skin in between, are painful else can it!