Universals Compatibility This 17mm ball head to 1 / 4-20 adapter works with cameras, phone mounts, tripods, rings lights, and more, ensuring seamless integration with various devices Standardized Design Features 17mm female ball socket and 1 / 4-20 male thread, complying with industry standards for camera and accessory mounting Wide Application ranges Perfect for tripods, cameras, car displays, phone holders, soft tube mounts, and webcams, enhancing versatility in multiple setups from and metal, this adapter for long use Easy Conversion Quickly convert your existing 17mm ball head mounts to accommodate standard 1 / 4-20 threaded accessories like cameras and lighting equipment