First one I bought and it worked but I couldn't get enough torque on the nut with it. It kept slipping out no matter how hard I pushed against the tire. I was close, but it's out of spec. If the "teeth" were a bit longer, maybe even 1mm longer, I think that would help with a little hesitation as I cranked to keep them in the nut. Maybe that's a lay opinion, but that's my experience.