The RAM-108B-246U consists of a strap clamp 1.5" diameter ball base, standard length double socket arm and VESA (4 X 75mm) (4 X 100mm) plate. The strap will accommodate rails from 1" to 2.1" in diameter. Included is a rubber protection strip to help reduce vibration and to prevent scratching of the mounting surface. The 4.75" square plate contains 4x100mm holes and 4x75mm holes in each corner.