HSH-A Manual Lever Block produced by our company is a new kind of product which is ameliorated on the basis of introducing the advanced technology from primary goods. It has such distinct merits as small cubage, light weight, beautiful appearance, small manual force, safety and reliability, and long operational life-span. It is especially used in occasion without power source such as shipbuilding, post office, mines, electric power, and transportation units in heavy goods suspending, equipment fixing, mechanism traction, and aerial exercise. It can rapidly unhitch brake equipment under unloaded condition, so that the flying hook can remove fleetly. We also can choose and add structure without light load limit according to the needs of clients...