Material:Aluminium alloy 6061+Sponge protection the mobile phone Fit for3.5-6.2 inch phone etc,for the phone's width from 50mm to 100mm Install on: 31.8/25.4/22.2 handlebar Easy to use:This Phone holder with Complete mini tool for install, Not need other tool by yourself. Range of Use: Motorcycle/MTB/Road Bike/E-bike/Folding bike/scooter etc