This ingenious tool works great for installing extended wheel studs in Mazda Miats's. It will also work for almost any automotive application. Simply slide the tool over the stud, thread on any tapered lug nut and tighten the nut using a wrench or power tool. The bearing on the underside, allows all the force from the nut to be applied to pulling the stud into the hub, perfectly square. Much simpler than press or vice, easier than a hammer. Use over and over. A replacement bearing is available if yours ever wears out.