Magnet to hold medals

I am a medal mounter in Darwin and I have been asked on a few occasions if I can use a magnet on the back of medals. I have not come across a magnet that is strong enough to hold the weights of medals and was wondering if you are able to assist me with this please.

We only have one Badge Magnet in our range, if that doesn't work then we stock Neodymium disc magnets which will be strong enough to hold a medal, provided that the surface the magnet is adhering to contains ferrous metals - gold, silver or aluminium won't work as they aren't magnetic.