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· Big Dog
4,163 Posts
Unbeknownst to some people, computer hard drives have a powerful magnet inside. Working in IT I have acquired a few of these magnets from dead hard drives which I use to locate nails in boards. I also screwed a number of them onto a board, attached a handle and used it as a crude metal detector to find dropped screws in my yard after building my deck.

NOTE: These magnets are only found in hard disk drives (HDD), not in solid state drives (SSD).

Of course you could purchase some rare earth magnets from a craft or hobby store or online.
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