The Grip-On Mounting System from On-Stage is the fast and easy way to mount your mobile device to everyday objects and surfaces. The U-mount is the ideal balance of ease and hands-free convenience. Once you try the Grip-Onu-mount holder, you’ll want to use your mobile device everywhere.  The system includes three Grip-On Holders: Small holder grips: 2½" to 3½", Medium holder grips: 3½" to 5¾", and Large holder grips: 5¾" to 7¾".