The RAM-B-166-UN1U, twist lock suction cup mount consists of a 3.25″ suction cup locking base, diamond base end and universal cell phone holder. The mount is designed with a RAM 1″ patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The cradle is designed to hold a large amount of different kinds of cell phones and small electronic devices. This cradle has padded locking side clamps that close tightly on the item you want to hold. To release the clamp hold, simply press the button found at the bottom left side of the cradle which will spring the clamps open. At the base of the cradle are two small supports to hold the bottom of the item securely in the cradle. Simply attach the suction cup base to the windshield of your vehicle for an easy and safe way to view your handheld device in your vehicle. High quality materials ensure your electronic device is safe, secure, and within easy reach. RAM’s patented design also dampens shock and vibration helping to extend the life of your mobile device. Cradle Dimensions: Minimum Width: 1.5″ Maximum Width: 2.5″ Side Clamp Height: 1.56″ Side Clamp Depth: 1.13″ Cradle Height: 3.62″ Material: High Strength Composite & Powder Coated Marine Grade Aluminum Ball Size: 1″ Rubber Ball „B” Size Note: The „U” in the part number reflects product packaged in poly bag. Related Links:RAM Suction Cup Mounts Page RAM® double socket arms with their distinctive hour-glass shape are designed and recognized to provide the best possible performance for most any application.