1. material: composed of a lightweight carbon fibre handlebar and durable aluminium handlebar mounts. aluminium alloy, sturdy and durable, shiny and without fading 2.SPACE BREAK OUT Break through the space restrictions of your bike and expand your mounting options. A wonderful ride for cyclists. This bike handlebar extension provides extra storage space on the handlebars, so you can attach your phone, odometer, flashlight, GPS device, navigation device, smartphone, lamps and more to the handlebars 3.EASY ASSEMBLY DISASSEMBLY: Standard hex bolts with hex key. Easy to install and remove. Two handlebar mounts ensure a strong and stable grip. They are removable and can be assembled as needed 4.SAFE AND STURDY Once the brackets are attached to the poles with our specially designed screws, you no longer need to worry about them tipping over, getting damaged or dislocating on bumpy roads. Much more stable and nonslip than other bike extensions with clips