A hand chain block is a manual traction tool that comes in two types: chain and wire rope. The chain type is more common and has many models. It is a lifting machinery that uses human power to pull the wire rope or chain through the handle to assist in lifting cargo. It is suitable for shipyard hull splicing, welding, high-voltage transmission line joint pulling and cutting by the electric power department, as well as cargo binding. The handle of the hand chain block has gears, which are divided into up, middle, and down positions. To lift the cargo, you need to turn the knob to the up position, then press down on the handle to lift the cargo. The specifications of the hand chain block include 0.75 tons, 1.5 tons, 3 tons, 6 tons, and 9 tons.