At least it didn't work for me. Anyway, it fits the Jeep XJ 2000 sport wheel studs. I've tried installing them using the old style washer and nut method. The first hairpin started to come in, but slowly stopped. I removed the nut and noticed that all the threads on the bolt had loosened from the pressure. I thought maybe it was my fault. So I removed and inserted the second bolt and started the ratchet. The pen went in fairly smoothly. When I went to remove the nut, I immediately noticed something was wrong. Pulled the threads back =( The nut didn't bind and didn't unscrew all the way. I had to pry open with a ratchet and hammer with a hammer. So I gave up, I'm sure they'll work great if installed properly B. With a tool, the threads do not withstand the assembly pressure.