1、Wide Application: Round ball head diameter 2cm, built in 3/8in screw hole, can be directly fixed to tripod, most third party ball joint arm, etc. 2、Extended Installation: The knob can quickly lock the device, with 1/4in screw, you can fix various accessories, such as monitor, fill light, etc. 3、Easy To Use: Easy to disassemble, you can according to your own equipment and shooting scene needs, free to use with a variety of equipment. 4、Safety Design: Ball head adapter with rubber ring and non slip pad to prevent accidental slippage of equipment, to guard equipment from scratches. 5、Mini Portable: Compact ball head, the overall length of 5cm, portable. Aluminum alloy material, sturdy and durable, fine workmanship, comfortable in the hand. 1 x Tripod Ball Head Adapter Item Type: Tripod Ball Head AdapterMaterial: Aluminum AlloyProduct Size: Approx. 3 x 5.5cm / 1.2 x 2.2inBall Head Diameter: Approx. 2.2cm/ 0.8inInterface: 1/4in Screw, 3/8in Screw Hole