The Ultralight GoPro Tripod Mount with Ball provides a ball mount that is compatible with Ultralight Control Systems clamps off of the GoPro's Tripod mount. The ball is permanently mounted, so it will not spin off. You will need the fixing bolt from your GoPro camera and a ULCS clamp to use this with other Ultralight components.
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.