The aluminum alloy chain block is lighter than general hand-operated blocks due to its own weight, making it suitable for high-altitude work and wire tightening operations. The aluminum alloy housing not only has high strength but also light weight. The hand-operated block can lift heavy objects vertically and can also pull them horizontally to tighten. It can also be used for self-rescue in case of vehicle breakdown. The chain is made of high-strength special alloy steel material, which is strong and tough, with the chain basically not suddenly breaking under overload conditions, but only slowly deforming. Standardly equipped with a 1.5-meter chain, it can be customized to other lengths such as 3 meters and 3.5 meters.