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 360 degrees of smooth, consistent, rotational movement. Durable, all metal construction for longer life. Wrench flats at the base of the stud allow for a positive hold and the use of sockets for quick and easy installation and removal.