The RAM-101-DAN1U consists of the RAM Tough-Tray with flat retaining arms, STANDARD length double socket arm and 1.5″ diameter ball double u-bolt base. The RAM Tough-Tray is spring loaded expandable tray that can accommodate 10 to 16 inch wide laptops. The tray includes four FLAT (4) side clamping arm; they allowing for your laptop to close completely while in the tray. These arms can be moved both vertically and horizontally. This allows for a custom fit for varying thicknesses of laptops and the freedom of not blocking ports or drives. Hole patterns on perimeter of tray facilitate the mounting of additional RAM systems to support GPS, PDAs or other electronics.