Easily Installs New Wheel Studs. Use with a ratchet or impact wrench to pull the new stud securely in place. Position the tool over the stud shaft. Tighten the lug nut against the tool to pull the stud in place. Works on most all automotive and light-duty truck wheel studs, import and domestic. NOTE: The bearing will wear with use and is not warranted. *Works on studs up to 9/16\" fractional & 14mm metric * inside diameter is .575 *1-9/16\" OD