General Tools 360 Magnetizer/Demagnetizer This magnetizer / demagnetizer is intended to be used with screwdrivers, nut drivers, wrenches, tweezers and other steel tools Thanks to a simple yet powerful design, this handy gadget can quickly convert any tool blade into a magnetic retrieval tool To magnetize a tool, simply slide it through the center hole. To demagnetize a tool, slide it through the side slots You can also demagnetize screwdrivers, nut drivers and wrenches before using them on sensitive electronic gear Measuring just 1 x 1 x 1-3/4 in., this magnetizer / demagnetizer is small enough to fit in most toolboxes