These chains are usually offset construction with the bushing or barrel being welded into the sidebar. Used for carrying and transferring product. Promac Welded Steel Mill Chain is your answer for a strong chain to take shock load and at the same time hardened to give good wear. Promac Welded Steel Mill Chains are constructed with the hardened barrel welded 360 degrees into the sidebars, and all parts are heat treated. This makes the tough applications in the forest products industry, grain handling industry and sugar cane processing a snap when using Promac Welded Steel Mill Chains.