The SM68825MM car or truck seat rail or floor mount can be used with all phones up to 8'' screen size, including Apple iPhone XS Max, XS, and XR, iPhone X, iPhone 8 and 8 Plus, iPhone 7 and 7 Plus, iPhone 6S and 6S Plus, Samsung Galaxy Note 9, Note 8, and Note 5, Galaxy S9, S8, and S7, LG G6, G5, and G4, Nexus 6 and Nexus 5, and Motorola Moto G and Moto X. It also holds midsize (7'' or 8'' screen size) tablets, including iPad mini, Galaxy Tab S 8.4, Galaxy Note 8.0, Galaxy Tab 3 7.0 and 8.0, Galaxy Tab Pro 8.4, and Google Nexus 7. This mount includes Arkon's Slim-Grip Ultra patented universal smartphone or midsize tablet holder and 18'' flexible aluminum gooseneck seat rail or floor mount with 25mm (1 inch) ball-compatible Robust Mount Shaft. The top and bottom adjustable-leg design of the Slim-Grip Ultra holder helps keep side buttons and ports unobstructed. Included with the holder are 8 support legs (4 short and 4 longer versions) that can be customized based on device size. For most devices, the best mount holder configuration is to attach 2 short support legs on top and the 2 long support legs on the bottom of the holder. Use a socket wrench to install the mount to the car's seat rail. Loosen the passenger seat track bolt, insert the included bracket, and then retighten the bolt. Bend the 18'' gooseneck and adjust both of the mount's 25mm ball adjustment points for 360-degree rotation of the device. Optional floor brackets are included for screwing the mount 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.) Patented holder (US Patent D750,060) fits phones and midsize tablets up to 8 inch screen size Ideal for fleets and service vehicles and commercial trucks 18 inch gooseneck and double adjustment points help position device