[Sturdy & Robust Structure: bike rear view mirror boasts a high-impact frame crafted from ABS materials and a high-hardness aluminum alloy base clamp. This harmonious fusion results in a robust structure impervious to vibrations cracks or breakage ensuring its longevity 360°Adjustable: The bicycle rearview mirror offers 360° rotatable adjustments combined with a 90° vertical adjustable lens leaving no room for blind spots. Enjoy the freedom to rotate and adjust it to any viewing angle you desire ensuring your vision remains unobstructed from every angle "HD Wide Angle Mirror: Our adjustable bike mirror adopts an expansive HD glass lens 6.6 × 3.7 inches in size ensuring distortion-free dizziness-free and lifelike images. With a larger rearview area youll easily find spots oncoming traffic from behind enhancing your ridings safety and convenience" Wide Compatibility: Designed to fit handlebars with a diameter of 22.2-25 mm (0.8-1 inch) Zacro bike side mirror is the perfect addition to a wide range of bicycles including mountain bikes E-bikes road bikes city bikes scooters and more Install In A Breeze: Comes with a hex wrench for your convenience. To install simply mount the bike mirror base onto your bicycle handlebar and with an effortless twist of the screw securely fasten the mirror in place. It will be ready for action in a few minutes]