【Suitable for Indoor & Outdoor Use】 This double ball head clamp is perfect for lighting stands, reflectors, tripods, crossbars, motorcycle handlebars, bicycle handlebars, selfie sticks, umbrellas, tables, ramps, and more. It can be mounted on motorcycles with an invisible selfie stick and is compatible with GoPro and other action cameras. (Clamp size range: 1.6 to 4 cm) 【360° Rotating Design】 The double ball head design allows for easy adjustments. Freely adjust the position of the super clamp by adjusting the knob. You can also freely adjust the angle according to your photographic needs. 【High-Quality Material】 Made from nylon fiber composite material, this double ball head clamp is incredibly robust and durable. It features non-slip rubber pads to protect your light stand from scratches and keep it balanced. 【Easy to Use】 The double clamp design allows for quick and easy installation and removal from objects. 【Installation Instructions】 The spring on the connecting arm assists in fixing the ball clamp. Press the side of the spring and place one ball joint on the other side of the connecting arm, then place another ball joint in the arm, adjust, and tighten it. Note: All data is measured manually, please allow for an error of 1 to 3 cm. Due to light differences and display variations, there may be slight real-world differences.