The RAM-HOL-UN8B-201U consists of a STANDARD length double socket arm and universal X-Grip®clamping cradle for 7"-8" tablets. The double socket arm is 3.69" in length and will accept all RAM 1" diameter ball bases. The spring loaded X-Grip® cradle expands and contracts, allowing for a perfect custom fit of your 7"-8" tablet. Included are extra easy access grip knobs, located on the back of the cradle for quick release of your tablet. The X-Grip® includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size. Cradle Dimensions Minimum Width = 2.5" (Minimum Height = 7") Maximum Width = 5.75" (Minimum Height = 4") Depth = 0.875"