Focused on improving safety for heavy vehicles on low-traction surfaces. These chains use high-performance manganese steel with excellent abrasion resistance and low-temperature tolerance for long life. Their core advantage is the secure, tight fit achieved via multiple external tensioning cams, providing uniform, reliable coverage for truck/tire tires, thereby greatly improving traction and stability on snowy or muddy roads. Follow safety advice: Install correctly on drive wheels, adjust after initial travel, and drive slowly and cautiously. This set includes 2 chains, a must-have for securing your winter journeys.