Package Includes: 2 car tire skid chains per package; Chains are made of manganese steel with a diameter of 0.35” [9mm]. Manganese steel construction:These Semi Truck Snow Chains are built with hardened Manganese steel which is wear-resistant, has a long service life, and is cold-resistant, ensuring reliable performance even in the harshest winter conditions. Tire Traction Chain :The four outside tensioning cams contribute to a secure & snug fit around the tires. This ensures that the wheel chains for snow remain properly aligned & in place, minimizing the risk of slippage or disengagement during operation. Enhanced Traction:These chains deliver excellent traction roads. The steel link design effectively grips the surface, enhancing the stability of commercial trucks,Pickup Trucks,Semi Trucks,Van,Dually Trucks,Atv,Light Truck,SUVs & pickups ,Heavy goods vehicles in snowy or icy environments. Easy Installation: Designed for quick and hassle-free installation, allowing you to get back on the road promptly.