Usage Tips:1DOUBLE BALL HEAD DESIGN: Consists of two 1/4inch screw ball heads and a locking clip. The ball head can be rotated 360 and can be freely adjusted to various shooting angles, making your creative ideas come true, ideal for filmmakers and photographers. 2MORE EXPANSION: Universal 1/4inch screws on both ends, can be freely mounted on tripods and other devices with equivalent interfaces. Strong compatibility, can be used with fill light, microphone, monitor, cell phone clip, DSLR, action camera and other products for expansion. 3STABLE AND NON SLIP DESIGN: The ball head adopts screw thread design and non slip rubber pad design to protect the equipment from scratching and slipping. The one piece locking knob has a strong locking force and a strong load bearing capacity. 4FOLDING AND STORAGE: This articulating arm is compact and portable, easy to use at any time. And it's compact size makes it easy to organize and save storage space. 5DURABLE MATERIAL: Articulating arm is made of premium aluminum alloy and is accurately CNC machined for durability and long lasting use.