Looking to mount your Hero or Hero5 Session to your GP-PRO or SS wearable gimbal? This adapter screws in place of your existing standard Hero3/Hero4 camera mount. Comes complete with necessary hardware, allen keys and (2) 1/4-20 stainless steel screws (one extra) to mount your Session. Please note the square Session housing that came with your camera is not included and is required to interface with the adapter.