These heavy-duty tire chains are designed for commercial vehicles. Constructed from hardened manganese steel, they offer wear resistance, cold resistance, and a long service life, performing reliably even in the most severe winter environments. The unique external tensioning cam design ensures the chains fit snugly and stay properly aligned on the tire, minimizing the risk of movement. The steel link pattern provides effective surface grip, significantly improving driving stability and safety for trucks, semi-trucks, and other large vehicles on snowy or icy roads. Easy to install. Please follow instructions carefully: install on drive wheels, check and adjust after a short test drive. Set includes 2 tire chains.