YOUR SAFETY FIRST:This unique bike rearview mirror is designed to give you clear visuals of the road conditions behind you to help keep you from road accidents..FULL ANGULAR ADJUSTMENT:Our bike mirrors is built to rotate 360°for maximum coverage. It's very easy to adjust to your desired angle and hassle- to install. Remember to fasten the screw after adjustment..LONG ARM FOR BETTER COVERAGE:The environmentally long arm made of aluminum alloy ensures that better horizon is covered for a clear rear view. Suitable for Bicycle handlebars which is 22.2 mm..STURDY AND DURABLE: comes with ABS optical frame and aluminum alloy which provide absolute protection to the mirror against breakage due to some slight bumps..We suggest you to buy this Bike Mirrors with absolute peace of mind as we willing to take prompt responsibility of any Complaints and to refund you within 30 days of purchase.