The RAM-B-316-1L-202U consists of the RAM POD I universal No-Drill vehicle base, 18″ rigid aluminum rod, single 1″ ball socket arm, locking knob and round base adapter. 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. The RAM locking knob, includes a brass 1/4″-20 thread, allowing you to disengage the screwing of the knob. Once you have set your mount in the location you need, you can lock it in place and feel safe that your mounted device will stay right where you left it. The 2.5″ diameter round base adapter contains the universal AMPS hole pattern.