Full Angle Adjustable: Both of these types fit well on handlebar inside diameters of 17.4-22mm. 360 degree rotation, better adjust to any direction, observe all directions of your back. Sometimes treat it like a mirror to check your face or fabric. 360 degree rotating axle mirror promotes clear vision and authenticity. Drive carefully:Easy Installation Align the sloped surface so that it is joined. 2. Note: The screws cannot be tightened at this time. upwards or downwards) and finally tighten the screws (tool in the pack). Strong and durable. High quality, impact resistant, no cracks. The mirror is polished. The mirror body is made of impact-resistant and durable nylon resin. The very solid construction ensures that this mirror lasts a long time. Even if you drive downhill, the rearview mirror does not shake, burst or break. - Order it risk-free. App. Can be fixed on the left or right side. Compatible with 17.4-25mm inner diameter of the bar. Mirror weight: 78 g. Designed for city bike, mountain bike, road bike, handlebar, trekking, etc.