Security Chain Company QG2439 Quik Grip Truck Mud Service Tire Traction Chain - Set of 2 On and off road use This set includes two tire chains Heavy duty (0.281") side chain and (0.312") cross chain Chain tighteners (QG20071, QG20074 or QG20074-10) are required, sold separately Does not meet S.A.E. class 'S' requirements