If you’ve ever found yourself wondering how those tool magnetizer/demagnetizer gadgets worked, [Electromagnetic Videos] has produced a pretty succinct and informative video on the subject. Wh… ...

A demagnetizer uses a magnet with negative polarity to rearrange the electrons in the metal of a tool to align with the magnetic field of the demagnetizer.

The Griot's Garage Magnetizer/Demagnetizer has been in my toolbox for a good ten years or so, and it still works like new. It also has a certain, "Hey, check this out!" factor amongst my gearhead ...