The RAM-B-101-C-UN11U consists of (2 QTY) 2.5" diameter round bases with the universal AMPS hole pattern, LONG double socket arm and universal X-Grip® clamping cradle for 12" tablets. The X-Grip® clamping cradle consists of a composite spring loaded cradle, expandable grip arms and additional bottom support keeper. Included are extra easy access grip knobs, located on the back of the cradle for quick release of your tablet. The X-Grip® clamping cradle expands and contracts for perfect fit of most 12" tablets with or without sleeves, as well as some smaller tablets. The X-Grip® 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.