The arm jack is in the category of class a electromechanical jacks of the superlife brand, which is designed For double-hinged doors and uses the mardoni power transmission system. The design of this model is such That it produces the least amount of sound while working, smooth, uniform and impact-free movement During operation is one of the characteristics of these jacks. The possibility of opening a single leaf, Planning and adjusting the opening speed of each leaf, adjusting the power and the ability to install an Electric lock are other possibilities available in this product. Superlife arm jacks have the ability to install An electric lock and the release system of this model is a wrench. This series of jacks in 4 courses 600, 500, 400, 300 are designed for double hinged doors with a weight of 250 to 400 kg per hinge