Fingers training kit - G2

Video : https://youtu.be/p2JiNKUGuKU

This is a second attempt to make a kit for my friend who had a stroke that make his left body paralyzed. He is recovering slowly during the last 2 years, and except the left arm, he can move his legs and can take care of himself.

This kit is to help him to open his palm, so that the muscle could learn a new palm-open stage. His palm can close but cannot open up. The kit is to give extra strength to keep his palm open - so he can learn how to move the mu