Useful for magnetizing or demagnetizing tools, such as tweezers, pliers, or craft knives. This makes picking up and manipulation of tiny parts easier.
Also, if your tweezers or pliers lose their grip during assembly, the part won't be lost.
Passing the tool though the top portion demagnetizes it. Passing the tool through the bottom portion magnetizes it. You can adjust the amount of magnetic power by passing the tool through with various lengths of penetration.
Made in China.