Accutronix "horizontal" and “vertical” side mount license plate kits will really clean up the back of your Sportster. They mount to the left side of the swing arm and are secured with the axle nut. Installation instructions and mounting hardware are included as required. Depending on how you assemble it, your license plate will sit "horizontal" or “vertical”. Machined from 6061 T-6 Billet Aluminum.