RAM Composite Clamp Mount with Universal Finger Grip™ cradle. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality composite materials insure your device is safe, secure, and within easy reach. The clamp base fits a rail or edge lip from 0.625" to a maximum of 1.25". The mounting base can also accept a second ball giving you the ultimate double ball base. Extra ball not included with purchase of this mount. The RAM Composite Universal Finger Grip™ cradle is designed to hold a large amount of cell phones and electronic devices. The holder comes with (3 sets) of four flexible rubber coated fingers placed along sides to grip your device. The fingers open by squeezing the ends to open the small finger arms. The bottom of the holder includes a back plate that adds support to the device being held by the mount.