If you are not careful, you can get your fingers pinched by them. they are that strong. If you have any kind of magnet usages, these work much better than the normal fridge magnets. Simple square bars.
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60X10X3Mm Neodymium Bar Magnets 25 Pack - Strong Permanent Rare Earth Magnet With Double-Sided Adhesive For Craft, Fridge, Kitchen And Office.
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