The manual operation of the hand chain hoist is suitable for use in situations without power supply, such as lifting heavy objects, equipment installation, mechanical traction, and overhead wire work. It can quickly disengage the braking device when unloaded, allowing the lower hook to move rapidly, thereby improving the working efficiency of the user. The application of the hand chain hoist in mechanical traction and overhead wire work further demonstrates the product's capabilities. It achieves a linear pulling force matching the load by manually turning the handle using the lever principle, which alternately acts on one clamp body within the mechanism to drive the load movement. It features a compact structure, light weight, small size, and convenient and labor-saving carrying. The tonnage specifications include 0.75 tons, 1.5 tons, and 3 tons.