Maximum load 5kg Ball Joint Diameter:12mm Screw Diameter: 1/4 inch Style: D :One long 1/4 screw hole and one short 1/4 screw at both ends Material: Aluminum alloy colour: Black+Red Package Contents: 1 x Ball Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Knob upper limit adjustment design, When the position of the ball needs to be adjusted, the knob adjustment sets the upper limit, The ball will not detach from the splint, Will not cause the ball to fall off due to over-adjustment, and damage the expanded equipment connected to the ball The Combination can hold up your Camera, Monitor, or any device with a 1/4 inch thread hole to shelves, plate glass, crossbars, steel, or desktop. 1/4 screw adapter, universal double- adjustable bracket for LED lights, monitors, mobile phone selfie sticks, bicycle phone holders, sports cameras. Knob lock, Aluminum alloy knob, clockwise to lock and fix, counterclockwise to loosen and adjust Easy to install, adjust, and remove. With a 360-degree ball mount which allows you to change the angle as you want. For the clamp, 180 degrees rotatable, you can according to your needs to mount for your camera kits, can be freely adjusted to meet your needs.