Because I trust Amazon! I have ordered this product. but the factory that makes it should be ashamed to sell it. I want to go to Ursa Major on the 13th of this month and when I got to the mountain a chain was required and I was so proud of myself I had to put a chain on and I was sure my family would ride with me chains , but I didn't expect it to cut the first 2 miles in heavy snow. I put three on each tire and the damage was individual, one at a time, to the point of damaging the car. I have to stop six times to take the cut and hide it under my skirt. I was lucky to survive with my family.