Just a simple tool to be able to twist the neck release mechanism on the Guitar Hero Live guitar.
Note: A large flathead screwdriver also works but I didn't have one that fit, so quickly came up with this solution.
Shoutout to GFocusTV for the image credit. I had already packed up my guitars to be shipped before taking photos so I grabbed the photos from their video.
The author marked this model as their own original creation.