Perfect connection with the ball head to connect the fill light, flashlight, camera & waterproof housing or action camera during normal shooting and underwater photography. Features: Made of hard anodized aluminum alloy, lightweight, durable, and corrosion-resistant, it can rotate 360 degrees. This standard clamp attaches two 1-inch diameter balls. Thicker plates provide the perfect combination of strength and range of motion. The spring-loading of the plates makes it easy to mount and dismount your arm system. Free connection and fixation in multiple positions, providing more freedom to adjust the flash direction. The ball clamp is used to connect 2 arms, base adapters, and flashes together. Clamp mount for 1" ball, compatible with most arms and cameras. Specifications: Material: Aluminum Alloy Color: Black Screw Interface: 1/4" Product Size: 2.5 * 2.17 * 0.98 inches Net Weight: 58 g / 2.1 oz Package Size: 8.4 * 7.5 * 3.8 cm / 3.3 * 3 * 1.5 inches Package Weight: 78 g / 2.8 oz Package List: 1 * Butterfly Double Ball Clamp Mount