They can only be broken by rough handling, the way I see it is if I go to the store and buy something in a blister pack and tear it or cut it opening the blister pack, it isn't the manufacturers fault, I was overzealous in opening the package, so, we would not cover it. If you just are careful removing it and don't pull when you meet some resistance it is not an issue. It is packed in a piece of cardbooard that is cut to fit the piece. I have had one since Macna and I have connected it and disconnected it from the magnet a few times without issue, I think the piece is structurally sound.