During the operation, the lifting point must be confirmed according to the weight, volume and shape of the lifting object, and appropriate lifting slings must be selected. When using the snap ring, it is forbidden to force the snap ring laterally. Before lifting, check whether the closing pin is tightened. The snap ring with cracks and deformation shall not be used. It is forbidden to repair the snap ring by welding.

Slings are ropes made of steel wire ropes or synthetic fibers for hoisting. It is also called jack rope or jack rope or rope buckle. It is used to connect the crane hook and the hoisted equipment.