RUGGED AND DURABLE - Each bike mirror is made of high quality nylon resin, shock and shatter resistant, and weighs only 78 grams; HD cycling mirror lens with anti-scratch protective film, the protective film needs to be removed before use, ABS handle,strong and durable , the mirror should be used for a long time. HD Safety Convex Mirror Bike - Mountain Bike Mirror has a convex lens that provides a wide field of view and can be adjusted to any viewing angle. Please remove the protective film before using the bicycle mirror. 360 Degree Rotation - The bicycle mirror has a full 360 degree rotation and can be adjusted to any direction, helping you to see in every direction. Better adaptation in all directions View all directions of the back, thus ensuring a safer ride. EASY TO INSTALL - Installs in minutes - 1. Mirror aligns the sloped surface to attach the end of the bike stem; 2. Insert the attachment point expansion bolt fully into the end of the handlebar; 3. Using the hex wrench (included in the package), tighten and adjust to the desired location. Suitable for - Fits handlebars between 17.4-22mm in diameter, bike mirrors are suitable for left and right sides. Great for city bikes, motorcycles, e-bikes, BMX, mountain bikes and road bikes. The package includes 2 * bike mirrors, 1 * hex key.