Compatible with a GoPro® cameras to mount on trays & camera accessories This adapter adds a standard 1/4-20 tripod mount to your GoPro® camera, allowing for quick and easy mounting to underwater lighting and other accessories. For even more versatility, the included 1/4-20 stud allows easy attachment to camera bases, as well as to the base of accessories like the AquaPod and Flex-Connect Handle. Attaches using the thumb knob and bolt from your original camera mount. An acorn nut is included.