[philso]

The ones in the hard drives I have opened up were not that big so they are not likely to do any real damage, unlike the larger ones.

They are really handy for magnetizing screwdrivers. It makes the screws stick on the end all by themselves, freeing up one of your hands.

Just make sure you don't put the magnets in the same pocket you have your wallet since they may wipe out your credit cards. You may want to put them in your wife's purse for the same reason...