Made of Lightweight Aluminum Alloy material: Corrosion-resistant aluminum alloy (hard anodized body) meet the highly accurate and durable requirements. Function: Perfectly connect with the ball head to plug in the fill light, diving flashlight arm or for GoPro action camera etc. when normal shooting and underwater photography. Features: Made by Aluminum alloy, lightweight, durable and anti-corrosion, can rotate 360, degrees, multi-position free connection and fixation, have more freedom to adjust the flash direction. Usage: The ball clamp is used to attach 2 arms, base adapters and strobes together, the clamp mount for 1 inch ball arms for Gopro Hero 5 6 4 3 for xiaomi yi 4k sjcam action camera accessory and others. Ergonomic Design: Ergonomic spinning handle design, naturally suitable for fingers and made of resin to enhance its operability, with lower power consumption, easy to loose, adjust the relative,can connect multiple diving devices. Have a higher degree of freedom to adjust the flash direction. The Standard Clamp attaches two 1-inch diameter balls. Thicker plates provide the perfect combination of strength and range of motion. Plates are spring-loaded for easy assembly and breakdown of your arm system. A hard anodized aluminum wing nut allows for easy one-handed operation and will withstand years of use. Compatible Action Camera Brand:for Yi 4k, for GoPro, for EKEN, for SJCAM, for NIKON, for SOOCOO, for SONY Sjcam, for Garmin, Camera Colour:Black Material:aluminum alloy Package Contents: 1 * Ball Head Butterfly Clip 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.