Fits Large Truck and Skid Steer ( 33" tall tire and larger) Keeps the tire chains tight and in place - thus maximizing the life of the tire chains. Adjusters or another tensioning device is a must for best performance. Mounts to the side chain on the outside of the tire. One pair per set is recommended. sold per pair (2) Heavy rubber arms attached to a welded ring. Rubber arms spaced evenly for even tension