KITO chain block has beautiful appearance, small volume, safe and reliable use and excellent overall strength; High transmission efficiency, light hand-pull, good hand-pull zipper feel, greatly reducing the labor intensity of operators. The gearbox and cover with strong impact at the impact position are isolated from rain and dust, and the braking performance is safe and reliable (mechanical clutch); Double pawl spring improves reliability; The hook has a high-precision and high-toughness gear with strength and operability; The bearing with high mechanical efficiency has a unique structure; Smooth chain guide mechanism of load chain is smooth; The chain stopper is a chain stopper during over-drop operation, and the load chain has high strength.