Safety first! These snow chains are designed to help truck drivers effectively manage the risks of winter driving. Their manganese steel construction provides robust physical protection, resisting wear and cold. Through an optimized tension cam design, the snow chains are securely mounted to the tires, providing valuable traction for trucks and semi-trailers on highly slippery icy and snowy roads, enhancing vehicle handling and reducing the likelihood of accidents. We strongly recommend that you carefully read and follow all safety instructions, including post-installation adjustments, strict adherence to low-speed driving rules, and attention to unusual noises. Each set contains 2 snow chains.