Used on axles from a 1986 Chevrolet K30 truck. They will fit any 9/16x18 tapered seat stud. I needed them because aftermarket aluminum rims will not fit a standard 7/8 nut due to the width of the nut. All 32 nuts installed smoothly and without any problems. The quality seems good and the product fits. It's good to have two keys. I don't know how they are so cheap!