Tether Tools Rock Solid Articulating Arm (11-Inch)The Tether Tools Rock Solid Articulating Arm with Hot Shoe 1 4 inch 20 Adapter is designed to hold a variety of devices including iPads, tablets, phones, and other lightweight fixtures solidly in place. Easy to Use The Rock Solid 11 inch Articulating Arm is designed to hold a variety of devices including iPads, tablets, phones, and other lightweight fixtures solidly in place. It is easy to adjust and maneuver, simply turn the single knob to release