Hand Therapy Cone

My wife has a pain in her hand near the thumb and went to a therapist that specializes in hands. The therapist used this type of cone to help her. Perhaps someone out there can use this to help with hand pain. I am not a doctor or a therapist. That is why I am not giving any instruction on how to use this. There should be videos available online to guide you, but I do not want to be responsible. Use at your own risk.