I got these for magnetic diy spice jars. The jars are only 3oz each and then spices which can’t weigh that much but putting one magnet on the inside of the lid it wouldn’t stick. I put the magnet on the outside of the lid and it sticks but slides. These don’t seem to be as strong as made out to be. They are strong when working together with multiple magnets but that’s not ideal for someone not wanting to or able to use more than one.
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