Peerless Chain AutoTrac Tire Chains 0153510 can help improve traction in winter weather conditions. The set includes chains for two passenger car tires and features case-hardened 3.8mm cross chain with a 12mm profile. These snow tire chains are self-tightening . self-centering and have dual high-impact polycarbonate self-tightening ratchets that eliminate loose chains and re-tightening stops. They are installed on the outside of the tires and fit a variety of passenger car tire sizes.