I've used quite a few gorilla nut kits and this is next class rubbish. They immediately twisted two ARP wheel bolts on my race car and forced me to disassemble the front hub and rear wheel to fix them before the race. (and yes, I hand-threaded them first) Also, the head sizes are so different that every third time you remove the impact nut, the lug nuts will seize on the bushing. It's absurd how their quality has gone down, but their prices haven't gone down. Goodbye gorilla.