The Portable Tow Truck (1 Set Black) - Tire Traction Mats & Snow Chain Alternative ***Free Shipping in the US*** Works on any vehicle with tires in snow, ice, mud and sand. Used by the largest parcel delivery companies in the world. Saves time, money and headaches when you get stuck in snow, sand, mud, and gravel. Made from high strength polypropylene so the parts are virtually indestructible. Each set contains 2 traction pads (one for each spinning tire).