I find magnetised tools to be a pain. They never really hold what you want them to hold, but they are good at pulling other parts out of place (try fitting a screw with a magnetised screwdriver through a set of washers/spacers and see the latter go all over the place). Although off-topic, try assembling the diaphragm blades of a camera lens (would making it a camcorder lens put it on-topic?
) with magnetised tweezers!
I bought a few non-magnetic tools (a couple of screwdrivers and a pair of tweezers). I am trying desperately to think of a good excuse (other than the price of over £200) not to buy a set of non-magnetic watchmaker's screwdrivers.
I have had some success demagnetising small tools using the bulk tape eraser (put the tool on top, turn it on, remove the tool to arms length).