RAM Mounts Universal Finger Grip Smartphone Cradle The RAM-HOL-UN4 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 spine plate contains the universal AMPs and 1.5 x 2 hole patterns. Compatible with any of the available RAM Mounts Cradle Adapters . 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 Height Dimensions: Minimum with Top and Bottom Plates: 5.25 Maximum with Top and Bottom Plates: 6.0 Top and bottom plates can be removed for larger devices Spine Plate Dimensions: 3 Width x 3 Height Using Short Arm Side Clamps: Maximum Depth: 0.75 Minimum Width: 1.25 Maximum Width: 3.0 Using Medium Arm Side Clamps: Maximum Depth: 1.25 Minimum Width: 1.5 Maximum Width: 3.5 Using Long Arm Side Clamps: Maximum Depth: 1.6 Minimum Width: 2.25 Maximum Width: 3.5 Material: High Strength Composite Note: This RAM Mount Holder does not include the Diamond Base and Ball required to attach to the Holder and RAM mounting system.