The hook is simple to manufacture and convenient to use, but its stress is not good, and it is mostly used in the working places where the lifting capacity is less than 80 tons; Double hooks with symmetrical force are often used for large lifting capacity. The laminated hook is riveted by several pieces of cut and formed steel plates. The whole hook will not be damaged in case of cracks in individual plates. It has good safety, but has a large deadweight. It is mostly used on cranes with large lifting capacity or for lifting molten steel drums. The hook is often impacted during operation and must be made of high-quality carbon steel with good toughness.