One of the nuts is unthreaded and more than half of them are drilled off center. They wiggle a lot when I twist them in and out and I think if I used a percussion gun something would break pretty quickly. The only reason I'm giving these 2 stars instead of 1 is because they appear to be made from decent quality steel and the black finish seems pretty solid. Unfortunately the 31/32 working nuts aren't good enough and using hand tools every time I want to turn the wheels would suck so I'm sending them back to try and find a better quality set.