"RAM MOUNTS (RAM-316-HDR-202U) - RAM (Reverse Configuration) Universal No-Drill RAM POD HD Vehicle Mount with Double Socket Arm & 2.5" Round Base (AMPs Hole Pattern).brbr The RAM-316-HDR-202U is installed on the driver side of the vehicle. Please see the RAM-316-HD-202U that installs on the passenger side (most common). 1.5 inch diameter rubber ball sizel.brbr Blending the best of versatility, strength and installation ease; the RAM ToughPod HD™ is a workhorse for fleet and serious consumers alike. Compatible with a wide range of vehicles and simple to install, the RAM ToughPod HD is an ideal solution for mounting tablets, small laptops and other similar devices. Requiring minimal space in the vehicle cab, it can be remove quickly without the use of tools. The versatility of the RAM ToughPod HD makes it an ideal solution for mixed vehicle fleets, consumer vehicles of all types and other applications which require a robust mounting platform for your tablet.brbr