1.Gravity design，easy and convenient to put use and take，
2.metal+positive oxidation handcraft，high-end and quality
3.precise mechanical gear to lock mobile ，no noise to you
4.Automatically flexible clamp，suitable for 4.0 to 6.5 inch device
5.Silicon back clamp tight air exit，steady and no damage to blade
6.easy to change angle degree as you want.