Grip-On Universal Device Holder with u-mount Mounting Post •  The ideal balance of ease and versatility•  Try it anywhere! Mic stands, music stands, rec chairs, car headrests and more•  Mounting post functions for typing or viewing videos•  Compatible with standard 11-19mm round mic stand tubing. Perfect for reading sheet music, typing, and other activities.•  Use the Mounting Post as a comfortable handle•  Mounting Bar stays put while you're free to roam with your mobile device•  Mounting Post doubles as a monopod to prop your mobile device upon desktops or other flat surfaces•  Perfect for audio engineers, grade school teachers, AV presenters, and everyone in between There are holders, and then there's the Grip-On Mounting System from On-Stage! It's 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-On u-mount holder, you'll want to use your mobile device everywhere!Includes 4 Grip-On Holders:Small holder grips: 2.5" to 3.5"Medium holder grips: 3.5" to 5.75"Large holder grips: 5.75" to 7.75"Largest Grip-On holder for devices 7"-9" wideIncludes 360-degree ball joint with pull back release:360 degree rotation, 30 degree tilt3 drop down slots allow 90 degree tilt for more flexibility8mm threaded stem and locking washer mate with u-mount bossAttaches/releases 360 degree Ball Joint assembly from the Mounting PostLocks in any of three rotational angles at the best starting position for your applicationIncludes Mounting Post:Collar engages the quick release Pull Back Release SleevePost slides into hole in the Mounting Bar5/8"-27 threading compatible with optional accessoriesIncludes Presentation Grip:Soft EVA grip slides over mounting postComfortable handle for mobile useIncludes Mounting Bar:Patent-pending u-mount clamp secures to any round surface from 7/16 to 3/4 in diameterAttaches to mic stands, drum hardware, car headrests, rec chairs and much more