The Garage Door Opener QL-ZQKMJ is the newest type of the Axial-driveGarage Door Opener which our company develop recently. This conductomits the required chain, guide screw and slide bearing, it drives thespring pole directly by motor, that you can install it easy and transferit convenient, too. The machine is designed small appearance, compactstructure large elevating power, reliable and no noise drive and longusing life.Packaging: Carton