Stop wheel hop and vibrations on hub piloted wheels! Hub pilot hole diameter tolerances can allow wheels to be installed and tightened in an "off-center" or clocked position. The 32115 is for Ford F450/550 Super Duty. These tools slide directly over thewheel studs in the 12, 4, and 8 o'clock positions. The wheel is then installed over the tools, the stud nuts are added to the exposed studs and tightened. The wheel is now centered precisely. The centering tools are then removed and the final stud nuts are added - torquing all nuts to mfg. specifications.