Consists of the Tough-Claw rail clamp base LONG length double socket arm and universal spring loaded X-Grip cradle for large phones and phablets Spring loaded X-Grip cradle expands and contracts, allowing for a perfect custom fit of your phone or phablet Included are easy access grip knobs for quick insertion and release of your handheld device The Tough-Claw rail clamp base is the perfect mounting base for quick and easy tool-less installation and removal on round, square, odd shaped rails and bars. Can be clamped on rails from 0.625" - 1.5" outer diameter Includes a device tether recommended for outdoor applications Minimum Width = 1.75" (Minimum Height = 5.5") Maximum Width = 4.5" (Minimum Height = 3.25") Depth = 0.875"