This Single Electric Magnetic Lock with 180kg Holding Force with MOV provides reverse current protection. Dual voltage 12 or 24 VDC(optional). The standard voltage is 12VDC when finished. Collinear load test 180kg, 350pounds. The standard voltage is 12VDC when finished. MOV provides reverse current protection. Anti-residual magnetism designed Electric Door Lock. High strength material, anodized aluminum housing. Design with no mechanical bolt. Increase the holding force, dual insulative hosing Electric Magnetic Lock. Magnetic Door Lock can add a lot to your gates security or even store front door.