Self-priming permanent magnet jacks are widely used in the lifting and handling of flat mechanical parts and steel, and can be widely used in molds and machinery manufacturing industries. Such as machinery and equipment manufacturing plants, processing centers, shipyards and other fields involving steel. It can be suitable for absorbing and transporting steel plates, ingots, and section steels. It can be used as a single unit or multiple units can be combined to absorb and transport large and long magnetically conductiveworkpieces.