Thickened Manganese Alloy Steel: Crafted from manganese alloy steel, these snow chains are heavy-duty and wear-resistant. Designed to withstand extreme cold, they remain durable and are less likely to break in snowy conditions. Superior Traction and Grip: Ideal for emergency driving on snow and ice, the tire chain structure provides strong anti-slip performance. It effectively enhances grip, quickly breaks through ice, and ensures stable driving with minimal vibration and noise. Tire Size Compatibility: These snow chains are compatible with the following tire sizes: 175-15；185-14；185/70-15；190/65-390；195/65-15；195/70-14；200/60-390；205/55-16；205/60-15；205/65-14；205/70-13；210/55-390；210/65-365；220/50-365；225/55-14；215/45-17；205/50-16. Please verify your tire size to ensure compatibility, and install the chains as tightly as possible for optimal performance. Auto Tightening for a Secure Fit: Equipped with an automatic tightening device for easy adjustment, these chains fit snugly on your tires and are less likely to fall off. Multiple fastening mechanisms simplify installation, eliminating the need for a jack. Safety Driving Tips: For safe winter driving, please maintain a low speed of no more than 30 km/h (18.6 mph) after installation. Avoid sudden braking or rapid acceleration to ensure optimal performance and safety.