
So, about the MIKEDE 15x3mm countersunk magnets—they all have the same polarity on the countersunk side. That means if you're using them in a project where you need the magnets to attract each other from that side, you might hit a snag, since it'll only work if you flip them to the flat side.
Our research shows this uniform polarity can be a bit restricting, especially if your project requires the magnets to attract on similar surfaces. Some folks have mentioned it complicates things when you want the magnets to connect back-to-back. You might have to flip them, which isn't always the best solution, or look into finding other magnets with the opposite polarity.
Besides the polarity quirks, the manufacturer notes these magnets are quite strong, with an epoxy coating for corrosion resistance, and they're great for things like tool storage and crafts. Despite the polarization hiccups, a lot of people find them strong, good quality, and affordable.
If your specific project needs magnets with differing polarities for them to align oppositely, you might want to explore some other options.
Another idea is reaching out to MIKEDE to see if they can customize something for you. Just be aware of the polarity challenge to make sure they fit your needs.
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