I purchased these nuts when my Ford dealer informed me that all of my nuts had suddenly failed and needed to be replaced. plus installation. Until I replaced them my tires couldn't spin and I was told that if I got a flat tire I would be in big trouble. I didn't want to order them but I did and received them quickly. I called my dealer and he agreed to install it. I just installed them today and was told they are better quality than the originals and there is no charge for installation. so it only cost me $23 for this replacement. I highly recommend this seller and can definitely vouch for the quality of these nuts.