The SP Connect Universal Bike Mount can be attached to any handlebar or stem with a diameter between 22 and 42 mm (0.9 - 1.65 inches). When you mount the holder with the arm, you can adjust your smartphone's angle. Without the arm, the holder is even more discreet, and your phone can be mounted in either horizontal or vertical orientation just like with the arm. Your smartphone can now be securely attached to your bike with a 90° twist, allowing you to easily navigate or use other apps. Tool-free mounting on the handlebar/stem; arm for angle adjustment; option for portrait and landscape orientation; two mounting options (A/B); for diameters of 22-42 mm.