Stop wheel hop and vibrations on hub piloted wheels! Wheel stud hole diameter tolerances can allow wheels to be installed and tightened in an "off center" or clocked position. The 32115 threadless wheel centering tool set (3) for Ford F450/F550 Super Duty slides directly over the wheel studs in the 12, 4, and 8 o'clock positions. The wheel is then installed over the tools, the stud nuts added to the exposed studs and tightened. The wheel is now centered precisely. The centering tools are removed and the final stud nuts are added- torquing all nuts to mfg. specifications.