CLEAR HIGH-RES WIDE-ANGLE REARVIEW - Well-defined glass surface with a fine anti-glare coating coupled with its sizable width, 4/6” or 117 mm, gives an excellent wide-angle rearview that covers all traffic from behind. The blue coating minimizes glare and the chrome one reduces significant glare. SHATTERPROOF & SCRATCHPROOF HARD GLASS - Shard-free breaking of the mirror glass prevents the rider from hurt by the broken glass from an accident. In addition, the hard glass measures 6 on Mohs scale, making it much more scratch-resistant than other lens materials for bike mirrors. HIGHLY ADJUSTABLE - The mirror arm is 360-degree adjustable as well as arm-length adjustable, creating a max installation flexibility and making it possible to give an optimal glass orientation/rearview for any riding positions. FOLDABLE - The Entrac deluxe mirror can be rotated 180 degree inward around the joint to be stowed away when not riding, protecting itself from unexpected impact and making it easier to pack the bike and put it in or on a vehicle. TOUGH STRUCTURE & CONVENIENT INSTALLATION - The mirror arm and housing are made from an eco-friendly Nylon and fiber mixture and the clamp strong aluminum alloy. The accompanying 5/32” (4 mm) Allen wrench is a handy tool designed to make installation and adjustment of the Entrac mirror on a dia. 7/8” (22.2 mm) handlebar a cinch.