These unique mirrors are CNC machined with a manufacturing process which allows to cut billet aluminum with variable curving radiuses (3D machining): the result is a unique product with stunning design. Mirror head and stem are one piece: the advantage of using one piece mirrors is that on bikes with high vibrations the mirrors will stay firm in the position you set them (on two piece mirrors with a pivot ball, mirror head tends to fall because of the vibrations). Obviously if your handlebars vibrate, the mirrors will vibrate with them. Mirror glass adjusts pressing on glass surface, with an internal system similar to the one used on cars mirrors. It fits also v-rod models (do not use oem star washers). Sold individually.