Aluminum alloy hand hoist is a kind of mechanical hand traction tool, also known as tightener. Its upper and lower hooks are rotary hooks, which are flexible and can be used even in narrow spaces. Not only can it be towed and tensioned, but it can also be lifted. The aluminum alloy hand-pulled hoist is mainly used for tying, tightening, fixing, lifting, position correction, distortion reduction, pulling and other purposes of mechanical equipment in different angles in power industry, high-altitude wire tightening, sag adjustment, cable drawing, ships, metallurgical mines, slope tunnels, shaft protection and other infrastructure projects. Tonnage specifications are 0.75 tons, 1.5 tons, 3 tons and 6 tons. The chain length is divided into 1.5m, 3m and 6m.