Great idea. Very important. However, the magnet needs to be a little stronger if you want to attach something heavy. I use it and I have no problems because what I use is light. I gave it to my nephew who put up a sign with a cross on it. The shield is quite heavy and heavier than my necklace. Says it comes off easily. Otherwise it's fine for my use, put a heavier magnet on it and it's a 5, but for the price they're good.
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