Set includes 1 Upper and 1 Lower Ball Joint with Hardware. The construction of our heavy duty ball joints are steps ahead of an OE style ball joint. We redesigned the internal assembly of the ball joint by replacing the plastic bushings with sintered metal. The characteristics of the sintered metal result in a heavy duty ball joint that will long outlast an OE style ball joint. Installation of our heavy duty ball joints is no different when compared to an OE style ball joint.