A345 Master Link Assembly(Forged Main Link) A345 master link assembly (forged main link) is one kind of common links. It is made by high qaulity alloy steeel with advanced international production process. The working load limited of it is from 4.1 ton to 40.3 ton. Because of its solid structure, it can be widely used in mine, large factory, shipping, metallurgy, bridge constraction and so on.