The Kauplus Wheel Stud Tools, for Installing studs for cars, truck studs, and trailer lug studs easy, Two size widely useful, work on a variety of vehicles and light-duty truck (three-quarter ton pickup trucks) wheel studs, each of 7/8” (22MM in diameter), and /16” (14MM in diameter) Widely useful works on most automotive wheel stud, both front and rear wheel. Use w/Impact Wrench or Ratchet, Wheel Tools, Press Studs and tighten the lug nut against the tool to pull the stud securely in place. Rotating bearing face designed for easy pull and reduces friction, without damage the threaded.