A magnetizer is a tool demagnetizer. It happens, unscrewing a small bolt in a hard-to-reach place of the car, as suddenly it unscrews and falls somewhere far away. At this point you think, but how good it would be if the screwdriver was magnetized. For this purpose, such a device was created to magnetize the improvised tool. The magnetizer allows you to not only magnetize, but also demagnetize the tool back, if for some reason you need it. For these two actions, there are holes in the fixture that are so signed.