Moog ES3489 Tie Rod End Problem Solver Belleville washer eliminates the spring bind and shattering during shock load. Problem Solver powdered metal gusher bearing design enables grease to flow through the bearing to the stud for reduced friction and enhanced strength and stability. Moog engineered steel composition results in a stronger component Full ball metal stud provides 36 degrees of smooth, consistent, rotational movement resulting in more responsive steering. Convenient easy access wrench flat allows for the use of a socket for easy installation and removal. Loose or worn chassis parts can lead to premature tire wear