Sturdy & Durable - Each safe rearview bike mirror is made by high quality nylon resin, impact-resistant and anti-shatter, only weight 78 grams; HD cycling mirror lens with anti-scratch protective film, need tear off the film before using, ABS handle,sturdy and durable, the mirror be used for a long time. Mountain bike mirror featured with convex lens, and offer a wide field of view, and could be adjustable to any viewing angle. Notice to remove the protective film before using the bicycle mirror. 360 Degree Rotation - Bike mirror is 360 degrees full rotation and could adjust to any direction to help you watch every direction. Better adapt to any direction to observe all directions of the back, which ensures a safer riding. Easy To Install - Well mounted in minutes - 1.The mirror aligns the inclined surfaces to connect bar end of bicycle; 2.Fully insert the connection point expansion bolt into the end of the handlebar; 3.Using the hex wrench (in the package) to tighten,and adjust desired position. Suitable For - Fits for handlebar of diameter within 17.4 - 22mm, the bike rearview mirror is applicable for both Left and Right sides. Great for city bike, motorcycle, e-bike, bmx, mountain and road bikes. Package included 2 * bike mirror , 1 * hex wrench. RUGGED & DURABLE Each rear-view mirror safety mirror is made of high-quality nylon resin, which is impact-resistant and shatter-resistant, and weighs only 78 grams. MULTI-FUNCTION HD safety bicycle convex mirror-mountain bike mirror with convex lens, provides a wide field of view, Easy to install-can be installed in a few minutes 360 DEGREE Bicycle mirror with 360-degree plane rotation, the position of the mirror can be adjusted. It has a complete rotation angle and can be adjusted to any direction to help you observe all directions of your back