The TABPB88L22 car or truck seat rail or floor tablet mount can be used with all large tablets 9 to 12 inches in screen size, including the Apple iPad Pro, iPad Air, and iPad 4, 3, and 2, Samsung Galaxy Note 10.1, Galaxy Note Pro 12.2, Galaxy Tab E 8.0, Galaxy Tab Pro 10.1, and Galaxy Tab Pro 12.2, Google Nexus 10, and Sony Xperia Tablet Z. This mount package includes Arkon's Universal Tablet Push-Button Holder and a seat rail or floor mount with 22'' flexible aluminum gooseneck. Arkon's Universal Push-Button Tablet Holder features a simple one-touch release push-button on the side of the holder (pedestals sold separately). The holder measures 6.5 inches high by 4.6 inches wide, and opens as wide as 9'' to securely grip any large (9'' to 12'' screen size) tablet. Insert your tablet horizontally into the holder and push down on the grip arm to lock the tablet into the holder. Adjust the 360° swivel to view the tablet in the vertical position. To remove the tablet from the holder, simply press the button on the side of the holder to release the holder's grip arm. The car seat rail or floor mount is made of strong aluminum, and is ideal for those who need easy access to their tablets but prefer mounting them somewhere other than the windshield or dashboard. Use a socket wrench to install the mount to the car's seat rail. Loosen the passenger seat track bolt, insert the included seat track bolt bracket, and then retighten the bolt. Bend the 22'' gooseneck and rotate the swivel ball adapter head for 360° rotation for exact positioning of the tablet. Optional floor brackets are included for screwing the car dock directly into the floor of the vehicle. (Warning: Drilling into the vehicle's floor may damage the vehicle. Use caution and consult a mobile install professional to avoid drilling into any sensitive vehicle components.)