I love these disc magnets! I bought them because I was tired of my grandchildren's masterpieces falling off my fridge door. They're so strong that it's difficult for Grandma to pick them up off a metal surface, but this can be accomplished by pushing them to the edge and then lifting them slightly. Holds cardboard well. I didn't use glue for this application so can't tell if it works well or not, but the magnets certainly do!
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