GUTMAN chains comes in many sizes. Our chain is made of high tensile alloy steel grade 8, which is suitable for rigging and overhead hoisting in construction. Gutman alloy chain possesses excellent ductile properties typical of most rigging hardware. The links actually stretch a little when overloaded. This deformation is a warning sign, cautioning the user that the chain has been overloaded and its capacity reduced. Deformed chains must be removed from service.