Unique arm design allows mirror to be used on driver and passenger sides without compromise of fit. Precision ratchet allows proper strap adjustment every time. Remove mirror in seconds by pressing quick release button on ratchet. Arms adjust from 5Š—_ to 13.5Š—_. Convex mirror head rotates 360 degrees and is mounted on a 2.5Š—_ arm that pivots approximately 3Š—_ up or down for additional adjustments. Mirror head measures 5Š—_ x 7.75Š—_.