Magnetic hooks for cosplay

I needed a way to secure neodymium magnets to my cosplay armours. Glueing them into the foam sorta works, but they can still come off the glue easily. Plus, they can slide off one another in two axes.
So I designed these hooks. Plop a 10mm round neodymium magnet into each, glue or screw them to your armour and boom! Because the magnet-to-holder interface is no longer solid/ flexible but solid/ solid, there's no glue coming loose due to one material shifting. And with hot glue, you can partially remelt the holders, creating a much stronger bond. The foam-to-holder interface is flexible/ flexible. Plus! No more sliding off! They're designed to be tilted apart.
I have confirmed these working on my form-fitting (ish) Pyrrha armour, as well as on my large-scale Space Marine armour.