The RAM-316-1AU consists of the RAM POD I universal No-Drill vehicle base, 18" rigid aluminum rod and composite button connection to attach single socket arms. The base of the mount connects to your seat rail without any drilling necessary. The 18" rigid aluminum rod can be bent to position your device to its optimum viewing location. Components to connect to the button end include the RAP-B-200-1U, 1" single socket arm, or the RAP-200-1U, 1.5" single socket arm. Both of these short arms will convert the button end to a single socket arm.