Heavy duty twisted link Truck Tire Chain. 7.14mm thick. Two Link for consistent traction and smoother ride. Since this is a 2 link chain, cams are not on the side chain since the 2 link takes the space of where the cam would be. Recommended for over the road, chain law, semi trucks.For plowing or extended use, the Heavy duty truck tire chains below are recommended when available in your size. If your tires are deep lug, mud, load range E, or AT tires, please contact us prior to purchasing.