Height adjustment function The height adjustment range is designed to meet the needs of different riders and riding positions, providing options to set the mirror height for sight lines. Installation The retractable structure allows height by tightening or loosening the screws to the desired position. It offers a straightforward installation process. Aluminum Rear View Mirror Adapter Kit Constructed from aluminum, this kit includes a mirror adapter holder, riser, extender, bracket, mounting base, and related components. It is designed to upgrade or extend your rear view mirror setup with sturdy, lightweight parts. Clear view and 360degree rotation The adapter enables clear viewing and 360degree rotation, so you can position the mirror at the ideal angle for your riding position. It helps you easily see oncoming vehicles. 23 practical use scenarios Urban commuting: adjust to different seating positions or helmet heights to maintain a clear view in stopandgo traffic. Longdistance riding: set the mirror angle and height for comfortable, consistent visibility during extended rides. Retrofit or upgrade: or extend existing mirrors on bikes with nonstandard mounts, improving reach and visibility without replacing the entire mirror set.