This rear-view mirror is designed specifically for mountain bikes and installs easily in the end of your handlebars. Designed with your comfort in mind, it can be attached to either the left or right side of your handlebars. Mounting is unobtrusive and does not interfere with your hand on the grip. Position provides a clear view around your body and arms. Three-inch convex mirror gives you a wide field of view and can be fully adjusted to any viewing angle. When riding on trails, the mirror can be quickly folded out of the way. Made from rugged polycarbonate with steel and brass components. Unique pivot nut and wedge system ensures a secure fit for various diameter handlebars.