This is a Brand New Pair of Mustang II Screw in Style Tubular Control A-Arm Ball Joints. These are screw in ball joints that will work with our Mustang II tubular A-Arms (uppers or lowers).  These may work with other brands as well, but not sure as we have the best luck with our GOLD style and do not typically use others.  They include the grease zerk and cotter pin.