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. HD Safe Bike Convex Mirror - 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.