When we talk about heavy chains, we generally refer to the ring chain of level 80. It can be used as a load traction chain for the lifting tool, or it can also be used as a mechanical transmission chain. It can also be made into cables. As a mechanical component, the sprocket is usually required, so the pitch of the chain must not be a stuck wheel. The inner width of the cable chain must be standard, so that the chain and card butterfly buckle will not be twisted. The application scope of the lifting chain is very wide. Under the same bearing capacity, the size is small.