The Husky Precision Magnetizer and Demagnetizer helps you magnetize and demagnetize screwdrivers, tweezers, tool bits and other steel objects. Step design permits greater control of magnetization. Overall size: 3.5 in. x 3.75 in. x 1.25 in. Magnetize and demagnetize screwdrivers, tweezers, tool bits and other steel objects Magnetize by sliding the tool through the plus opening Demagnetize by sliding the tool through the (-) opening Step design permits greater control of magnetizes Durable construction Dimensions Assembled Depth (in.) 1.13 in Handle Length (in.) 3.5 Assembled Height (in.) 2.06 in Shaft length (in.) 3 Assembled Width (in.) 2.00 in