Wefaner Finger Strengthener, Therapy Hand Ball,Finger Exerciser Ball, Finger Stretching and Rehabilitation Training for The Elderly,6 Piece Set.Brand: wefaner Features: Combination We sell them in 10 pound and 20 pound combinations,both hands can be exercised at the same time to enhance the coordination of both hands. Bonus 2 levels of resistance bands. Adapt to different people, different stages of finger training. Use You can use the grip ball alone to train hand strength. It can also be used with silicone finger covers to train finger flexibility. Insist on training for 20 minutes every