Gymstick finger resistance bands can improve finger strength for athletes (rock climbing enthusiasts, fitness, tennis, baseball, boxing, tennis, golf and shooting) and musicians (guitar players, bass players, pianists and violinists).
Its true .Those bands really helps to strengthen the fingures but wrist also need to be strong so i additionally use battle rope and boxing bag to excercise those body part.
Some people fingers shakes specially when they do writing or typing .I think those gym tricks are very recommeldable.
You have been using them too? That is good to hear. My wrists need work too - too much typing, not enough fighting ;)