FAAC 390 Electromechanical Swing Gate Operator (Single Kit) FAA 104572_5 commercial swing gate Max leaf length 40 Ft All Pedestrian Turnstiles Max leaf length 40 Ft The LiftMaster MJ is ideal for small rolling steel doors grilles and high or vertical lift sectional overhead doors in medium duty cycle commercial applications where a manual hoist is not required The self contained 390 24V Operator consists of an irreversible electromechanical motor and articulated arm The 390 24V Operator includes built in reverse on contact and a torque adjustment that controls the force transmitted to the gate leaf through the operator