All kinds of cranes and electric hoists are used for hanging cranes when they are used for various lifting and hoisting. They are used to hang steel wire ropes. They are concentrated components. They are required to be safe and should be safe. However, the opening of the upper part of the hook is open. In order to ensure sufficient tensile strength, the wire rope is made of high-quality spring steel wire, which has good tensile strength and certain elasticity. Therefore, when the wire rope is hung to the hook, it is often difficult to closely fit the hook into the hook. In particular, after a period of load-bearing and hoisting, the steel wire rope will have a certain bending and twisting phenomenon (the deformation is still in accordance with GB5972).