Cool, thanks Mrsd. Just ordered a set of the plastic ones. I actually found this site that explains there's a 45% reduction from the plastic.

They still have 5 lbs of pull so that's pretty good. I figure just stacking 2 would boost the overall strength and maybe get close to what one nickel plated one would have if I don't feel the effect from one.

Also, I found some more magnets on amazon that have gold plated magnets specifically for using on your skin. A bit more expensive, obviously, but still less than I expected (and the nickel ones usually come in packs of 10 which i don't need, so I'm really spending the same if I only need one). I found them after I ordered the plastic so I'll see if they work first before trying a stronger gold one.


EDIT: apparently I can't post links yet on the forum, but you can just search 'neodymium magnets gold' on amazon and you'll find them.