HSH Series Lever Blocks is a kind of portable and versatile hand-operated loading and pulling appliance, which is capable of being applied in electricity, mines, ship-buildings, construction sites, transports, and telecommunication for installing equipment, lifting goods, pulling mechanical parts, bulk strapping and fastening, tightening fittings of wires, assembling and welding etc. It has exceptional advantages particularly for pulling in every limited narrow places, in the upper air high above the ground and at any angles.