Function: Perfectly connected with the ball to plug in the fill light, diving flashlight arm or action camera, etc. when normal and underwater photography. Features: Made by Aluminum alloy, , , and anti-, can rotate 360-degrees and can rotate about 80 degrees in the horizontal direction, have more freedom to adjust the flash direction. multi-position free connection and fixation, have more freedom to adjust the flash direction. Multiple expansion screw holes 1/4 inch 3/8 inch, meet the installation requirements of customers. Usage: The ball clamp is used to attach 2 arms, base adapters, and strobes together, the clamp mount for 1-inch ball arms for Hero 9 8 7 6 5 4 3+ 3 4k action camera accessory, and others. Ergonomic Design: Ergonomic handles design, naturally suitable for fingers and made of resin to enhance its operability, with lower power consumption, easy to lose, adjust the relative angle of the joint arms firmly clamp the ball joints. Have a higher degree of freedom to adjust the flash direction. Scope of application: 1 inch Ball Joint Arm, with 1/4 inch, 3/8 inch Screws device. Compatible for Action Camera : 4k, , , , , , , , , , Camera size:70 x 42mm Material:Aluminum alloy colour: red Package Contents: 1 x Diving Butterfly Clip Clamp Only the above package content, other products are not included. Note: Light 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.