Products with magnets themselves cannot be demagnetized! If the whole screwdriver is made of metal, you need to put the whole in to degauss. If the screwdriver has a plastic handle, just degauss the head normally. (This degaussing function is poor, and the effect of magnetizing and magnetizing is very good) 1. No matter how good your screwdriver is, it will be demagnetized after a period of use. 2. The magnetic demagnetizer can be used for any tools that need to be magnetized, such as screwdrivers, screwdrivers, screwdrivers, etc. It is simple and convenient to use. 3. When it is difficult to pick up the screw, just insert the screwdriver into the magnetized end with "+", so that the screw can be picked up easily. 4. When repairing electrical appliances, electronic components, and accessories, insert a screwdriver into the end with a "-" character, and the magnetism can be removed immediately.