hook groupHook group is a most common spreader in crane. According to the shape of the hook is divided into singleanddouble hookhook; according to the manufacturing method for forging hook and laminated hook.Single hook has the advantages of simple manufacture, convenient, but the force is not good, mostly used in weight is below 80 tons of workplace; weight is often used by the symmetry of the hook. Laminated hook which is composed of a plurality of cutting forming steel plate riveted joint and individual plate cracks when the hook will not damage, safety is better, but the larger self, mostly used in high load or the lifting of the molten steel ladle crane. Hookoften impact in the process of operation, should be used in the manufacture of high quality carbon steel has good toughness.