Atlas Mobile Column Lift Systems feature an electromechanical lift operation. Rolled steel screw spindles, with bronze main and safety nuts, provide a positive lifting mechanism. The screws are automatically lubricated by felt pads attached to an integral oil reservoir. The carriages move on a series of extruded nylon runners which have a very low friction coefficient and provide excellent resistance to wear. These runners (made from Ertalon®) guarantee balanced lifting of the vehicle.