The RAM-B-177-UN4 consists of a glare shield clamp base, double socket arm and universal Finger Grip™ holder. Simply locate the clamp on any clamping surface up to 5/8″ thick and gently snug the nylon thumb screws. The double ball & socket system will provide perfect viewing angles to get the most from your electronic device. The RAM glare shield clamp with double ball & socket system is far and away the most discrete and clean way to mount most any compact electronic device to the glare shield of your aircraft. The RAM Composite Universal Finger Grip™ Holder 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. The perfect solution that is the best phone mount, car mount, motorcycle mount and can be used with several other phone accessories including samsung accessories and lg accessories. The spine plate contains the universal AMPs and 1.5″ x 2″ hole patterns. This mount is designed to hold the following devices: Cell Phones (check measurements below for dimensions) 2-Way Radios GPS Devices Works with OtterBox (Defender, Commuter, Impact) Cases, Phones with Bumper, Twisted Metal Case and More Perfect rugged solution for the Blackberry, HTC Evo, Droid X, iPhone, and More Use on your Motorcycle, ATV, UTV, Car, Boat and More Mount will attach to flat surfaces with the following dimensions: Min: 4.4mm / 0.17″ Max: 28.0mm / 1.12″ Material: High Strength Composite & Powder Coated Marine Grade Aluminum Ball Size: 1″ Rubber Ball „B” Size Note: Part number reflects product packaged in clear clam shell for store shelf display.