The HD004AMPS mounting pedestal can be used as a replacement, upgrade, or as an addition to an existing pedestal with a 4-Hole AMPS pattern. It is compatible with Arkon's Slim-Grip Universal Tablet Holder (TAB001-AMPS), as well as to Dual-T to AMPS adapters (sold separately) for compatibility with Arkon's Dual-T phone and tablet holders. It is also compatible with devices having a 4-Hole AMPS pattern, including vehicle-specific mounts (VSMs), cameras, GPS devices, audio/video receivers, or satellite radios including Sirius S50, Sirius XM Onyx Plus, XM Onyx EZ, Sirius XM Lynx, Stratus 7, Dock & Play, and Sirius Dock & Play (sold separately). This mount includes only Arkon's Heavy-Duty Aluminum C-Clamp Mounting Pedestal with 10” Adjustable Arm and 4-Hole AMPS Head (holders and adapters sold separately). The heavy-duty mounting pedestal is made of aluminum, and is ideal for an office or workspace where easy access to a tablet or smartphone is needed, but where surface space is at a premium. Install the C-clamp base on a desk, cart, worktable, bench, lectern, or other table-like surfaces. The 10” arm adjusts to provide optimum positioning. The C-clamp maintains a firm grip and opens as wide as 1.5 inches. Bend the 10” adjustable arm and rotate the swivel ball adapter head 360° degrees for exact positioning.