Arkon's PPTAB1AMPS Slim-Grip Holder with 4-Hole AMPS Mounting Pattern is ideal for holding portable mobile printers, including those from Zebra, Epson, and Brother. The holder is compatible with most Arkon and third-party (including those from RAM Mounts) 4-Hole AMPS mounting pedestals or adapters (sold separately). This is not a complete solution and includes only the Slim-Grip 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 holder features a spring-loaded design that makes it easy to insert or remove the printer by pushing down on the lower legs of the holder with one hand. Included with the holder are 4 support legs (2 short and 2 long versions) made especially for holding mobile printers. Choose the 4 legs that provide the best fit for your portable mobile printer. 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. The holder can also fit large tablets with 7"-18.4" screen size by switching out the printer support legs for the tablet support legs that are also included.