Well I was pretty happy with that when I pulled the first two. They fit perfectly on my car tires. The third was a little more difficult to put on. I then inspected a batch of 12 and found six large ones and six smaller ones. The smaller ones are threaded but don't have the good rubber insert that the larger ones have. What's in the world? Anyway I got it working. But I had to deduct a few stars for stupidity.