Arkon's locking tablet headrest mount is a road trip essential and is ideal for multiple passengers who want to view a tablet in the center of the back seat. The mount can be used with all large tablets 8.9 to 18.4 inches in screen size, including Apple iPad Pro, iPad Air 2 and iPad Air, iPad 4, 3, and 2, Samsung Galaxy View, Galaxy Note 10.1, Galaxy Note Pro 12.2, Galaxy Tab 4 10.1, Galaxy Tab Pro 10.1, Galaxy Tab Pro 12.2, Galaxy Tab S 10.5, Google Pixel C, Nexus 10, and Nexus 9, and LG G Pad 10.1. The mount features Arkon's headrest clamp base, which easily attaches onto most 2-post style headrests on either the front or back seats with an included Allen wrench. An adjustable double-ball Robust Mount Pedestal connects the base to a Metal Universal Locking Tablet Holder, which features a key lock (keys included) that keeps the tablet securely in place. The tablet holder is made of aluminum and includes multiple horizontal and vertical adjustment points along both sides, making it compatible with tablets up to 10.25'' x 8.5'', or as small as the G Pad 7.0, or as large as the Nexus 10. Use a 7mm and 10mm socket wrench to adjust the tablet holder to your tablet's size specifications. Security hardware is also included.