ZooMed magnetic holders
 

I cleaned out my sump yesterday and found this. It's a ZooMed magnetic holder, probably @ 6 months old, obviously a metal magnet in cheap plastic clothing, might want to check'em if you got'em.
http://i1139.photobucket.com/albums/...r/DSC00448.jpg

I've got a bunch of these to hold frags, they're all intact. I have seen other magnet products do that though, so always a good idea to periodically check them.