AttentionWhen you try to make the magnets apart, please slide and push the magnets one by one to avoid breaking them. Strong magnets, please take care. Super strong Rare-Earth magnets,once they get stuck with each other,they are hard to break apart.Can also be used to extend protected lithium batteries with recessed contact points.Electrically conductive (making them suitable to extend recessed batteries).Perfect for sticking notes on fridge doors.Great for do-it-yourself projects.