The HMHD005 headrest mounting pedestal can be used as a replacement, upgrade, or as an addition to an existing pedestal. It is compatible with Arkon's Dual-T universal phone and tablet holders (sold separately), including the Slim-Grip Ultra Universal Smartphone and Midsize Tablet Holder (SM060-2), Slim-Grip Universal Tablet Holder (TAB001), Universal Tablet Push-Button Holder (TAB003), Mega Grip Universal Smartphone Holder (SM040-2), and Mini Grip Smartphone Holder (SM015-2SLM). This mount includes Arkon's Heavy-Duty Aluminum Mounting Pedestal with 10'' Arm and Headrest Clamp Base (Holders sold separately.). Arkon's headrest mounting pedestal is a road trip essential and is ideal for multiple passengers who want to view a smartphone or tablet in the center of the back seat. The mount features a 10'' arm that attaches to the headrest post on either the front or back seats. The mounting pedestal installs onto most headrest posts. Position the 10'' arm and rotate the swivel ball adapter head for 360° rotation of the device.