The TABRMAMPS heavy-duty drill base mount is part of Arkon's robust mount series. It mounts to walls or other solid flat surfaces with screws, and holds large tablets with 9”-12” screen size, including the iPad 4, 3, and 2, iPad air 2 and iPad air, Samsung galaxy note 10.1, Galaxy note pro 12.2, Galaxy tab pro 10.1, And galaxy tab pro 12.2, Amazon kindle fire HD 8.9, Asus memo pad smart 10.1, Lenovo idea tab S6000, and Sony Xperia tablet z. This mount includes the heavy-duty 4-hole amps mounting pedestal and the slim-grip universal tablet holder. 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 with one hand. Included with the holder are 8 support legs (4 short and 4 longer versions) that can be inserted onto the top and bottom of the holder and can be adjusted to keep any side buttons and ports unobstructed. For the iPad 4, 3, and 2, iPad air 2, iPad air, Samsung galaxy note 10.1, Galaxy tab pro 10.1, Asus memo pad smart 10.1, Lenovo idea tab S6000, Sony Xperia tablet z, and vivo tab smart, the best mount holder configuration is to attach 2 short support legs on top and 2 long support legs on the bottom of the holder. For smaller devices, use all 4 short support legs on the holder. The mount uses the 4-hole amps mounting pattern, which consists of four holes located in a rectangular pattern spaced at 30.17mm X 38.05mm (Measured as the center-to-center distance between holes). The tough, low vibration pedestal measures 6.5-Inch high and is made of plastic and glass fiber. The pedestal swivels on both the top and the bottom, providing 360-degree rotation and flexibility in positioning the tablet at any angle. The mount can also be screwed directly into the floor of your 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.).