Each specific adapter is specially made for the corresponding motorcycle model to ensure the best possible fit. These adapters are made of aluminum. The FR552B kit allows Rizoma front turn signals to be mounted on the controls using the OEM mirror screw or with the Rizoma ONE rear mirror (code BS251B). As an alternative, by the screw included in the FR552B kit, it is also possible to instal END MOUNT or BAR MOUNT Rizoma mirrors.