Perfect for demagnetizing tweezers screwdrivers and other small tools and parts. Will also magnetize tools such as screwdrivers if you desire. This magnetizer has a high power to weight ratio and is housed in non-breakable plastic. It is a 120V AC intermittent use type which features a 1-1/2 by 3 opening and is 300 watts. A necessary addition to any workbench.