The magnets have proved so useful for my particular application that I have purchased them three times individually. I am writing this to give advice! When you separate the magnets, pay attention to where they are. If they come together without a plastic separator, you'll need a utility knife blade to start separating. If you want to put the plastic device back between broken magnets, USE the FOAM packing case. Place a stack of magnets, insert one or even TWO plastic rings, THEN place a single magnet inside. A single magnet hits the stack but is protected from destruction by a plastic ring. I hope my hard experience will be useful to you.
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