Optional light weight locking front differential hub for the Twin HammersFEATURES: Aluminum constructionweight reducing cross drilled holesColor: SilverYOU WILL RECEIVE: One differential locking hub Two lock pinREQUIREMENTS: Use center differential axle pin (from the stock diff)COMMENTS: light weight front differential spool for the Twin Hammers description revised by: WP May 9, 2014