I used this tool to remove swollen Ford Escape mounting nuts. 19 out of 20 failed with a 19mm head. I had to tap on the 19.5mm head to loosen the damaged lug nuts. It worked great! The tool is very well made and durable. Thank goodness the dealer caught the "swollen" nuts before someone flattened the tire and couldn't get the tire off with a wrench! worth the money.