Quik Grip HD Alloy Cross Chains are made from high grade manganese alloy steel. Alloy tire chains wear considerably longer than regular carbon steel chains. This makes them ideal for trucks that use their chains often and/or for extended periods of time. The square rod links have more gripping power than round rod chains. The heady duty cross chains will out perform any traditional ladder link chain on the market, lasting longer and providing much more aggressive traction.