The 10 mm hair loss heavy chain can be made into a ring chain crane. The single load of the 10 mm chain is 3 tons. The ring chain hanging cable has different specifications such as single, double, and multiple. The number of chains increases, and the load load is increased. Black chain can make the appearance of the chain more beautiful, and it can also delay the oxidation and rust on the surface of the chain. The length of the 10 mm chain is three times the diameter of 30 mm. Its unit weight is 2.15 kg per meter. Therefore, its size and high bearing capacity.