These magnetic discs are pretty darn strong, not strong enough to separate them but if you place them within 2 inches of each other they will attract. Two had broken off when I opened the box so these were unusable but the rest were fine (box of 70). Worth the money, used for many practical tasks. My Unique Use: I have a flag outside, I hang it from my eaves and the wind blows it up my gutters and gets stuck. So I attached four sets of these magnets to the bottom of the flag (in pairs on each side) to make it it harder - and it works great! The flag is no longer in the shaft.
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