Tablet Desk Holder: This versatile adapter mount is compatible with most 7 tablets (except 4:3 AR), most 2-in-1's up to 15.6 in size and 0.75 in thickness, and portable monitors up to 15.6 Adjustable Design: The spring-loaded adapter arm holder pulls out to accommodate a variety of screen sizes. When the mount is fitted to your tablet, simply tighten the two thumb screws to secure it in place