Arkon's TAB001-AMPS Slim-Grip Universal Tablet Holder with 4-Hole AMPS Mounting Pattern is ideal for enterprise or commercial applications where a secure connection between the holder and pedestal is essential. The holder is compatible with Arkon and third-party (including those from RAM Mounts) 4-Hole AMPS mounting pedestals or adapters (sold separately) and fits all large tablets with 7”-18.4” screen size, including Samsung Galaxy Tab S Series, Samsung Galaxy Note, Samsung Galaxy Tab Pro, Samsung Galaxy Tab 3, Samsung Galaxy Tab A, Apple iPad, Apple iPad Pro, Apple iPad Air, Amazon Fire Series, Microsoft Surface Pro, and Microsoft Surface Go 2. This is not a complete solution and includes only the Slim-Grip Universal Tablet Holder with 4-Hole AMPS mounting pattern (mounting pedestals sold separately). Formerly an industry standard, the 4-Hole AMPS pattern consists of four holes located in a rectangular pattern spaced at 30.17mm by 38.05mm (measured as the center-to-center distance between holes). Use included screws to attach the holder to an AMPS-compatible mounting pedestal or adapter. The Slim-Grip tablet holder features a spring-loaded design that makes it easy to insert or remove the tablet by pushing down on the lower legs of the holder. Included with the holder are 10 support legs (4 short, 2 medium and 4 long versions). Choose the 4 legs that provide the best fit for your tablet. These insert at the top and bottom of the holder and can be easily adjusted in order to keep any side buttons and ports unobstructed. For most large tablets, 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. For smaller tablets, use all 4 short support legs on the holder. For larger tablets including iPad Pro, use all 4 long legs. For vertical viewing, adjust the 360-degree swivel and then re-tighten.