Peerless 0155510 Auto-Trac Passenger Tire Chains feature a patented automatic tightening and centering system that will help keep them firmly in place. It automatically adjusts and tightens while you drive in order to provide the added traction that you need. This item boasts a high-impact, self-tightening ratchet system that ensures a snug fit and eliminates the need to stop and re-tighten the chains after installation. The split outside chain with two ratchet connectors will allow easy installation without moving the vehicle. This tire accessory also features an aggressive diamond patterned, cross-chain designed for superior traction and a smooth ride during use. The case hardened alloy cross-chains provide extended wear lift over standard link products. It is versatile enough to fit a variety of different tire sizes. Each package contains one pair of chains. It also comes with a handy hookup guide to help you get them properly installed.