Magnetic Flag Holder

I made this model for my fiancees flag. It sticks to any metallic surface and also kept the flag in place in various summer storms. 

I used these magnets: https://www.supermagnete.de/eng/disc-magnets-neodymium/disc-magnet-20mm-5mm_S-20-05-T 

I might expand my model in the future since it sometimes slides on flat metal surfaces in stron winds. Currently I avoided this behaviour by laying some additional magnets on the metal surface around the holder.