This button is to put the button on/off of the Fuji X100F.
It gives you a larger surface to grip when you are on/off of the camera.
It took several months to be developed and tested.
It's a beauty you work with this button.
NOTE: Due to material and process variability, it may be necessary to heat the material a little with a hair dryer to gently dock it.
A small piece of tape may be required on the inside of the ring to ensure a tight fit.