Moog ES3691 Tie Rod End 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. Problem Solver patented cover plate design allows for tighter tolerances vs traditional cover plate designs, providing a more durable and extended life part. 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. Patent pending Sunoloy coated metal bearings provide smooth stud swing technicians and drivers prefer. Convenient easy access wrench flat allows for the use of a socket for easy installation and removal. Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear