Peerless 0232105 Auto-Trac Light Truck/SUV Tire Traction Chain - 2 Count (Pack of 1) Auto‑Trac can be installed without moving (or jacking up) the vehicle! The patented, ratcheting tightening system automatically tightens the chain while driving. Just connect the inside cable, attach the two outside selftighteners and drive! No additional chain tensioners are necessary or recommended. Auto‑Trac will meet Class “S” clearance requirements on SUVs and pickup trucks, as well as normal passenger cars (matching the capabilities of most of our “Z” cable products). This is possible because of a highly effective, patented tensioning system. Auto‑Trac cross member links are made of manganese alloy steel, allowing them to be shorter, narrower and lighter than conventional cross members. This reduces “fly‑off” during operation and provides more gripping points. The low‑mass “D” cross section of the links also contributes to longer wear because the impact of the cross members on the road surface is reduced and the surface area contacting the road is increased. Security Chain Company QG20074 Quik Grip Light Truck Traction Chain Rubber Tightener - Set of 2 , Black Security Chain Company Quik Grip Light Truck Traction Chain Rubber Tightener is designed for virtually every type of use from passenger cars, SUVs to trucks, airport transporters, ATVs, garden tractor to snowblowers and forklift machines. Product 1: Worry-Free Self-Tightening Ratchets Provide Automatic Tightening And Centering Product 1: Easy Installation And Removal In Minutes Product 1: Do Not Exceed 30 Mph With These Chains On Product 1: Diamond Pattern Cross Chain Provides A Smoother Ride And Superior Traction Product 2: Light truck rubber tightener