The Flex Gripster Trainer helps strengthen your fingers while on the go.
The Flex Gripster Trainer can improve the finger strength of athletes (rock climbing, fitness, tennis, baseball, boxing) and musicians (guitar, bass, pianist, and violinist) and daily housework ( driving, typing, writing, working, etc.).
Choose up to 6 different Resistance Levels.
The Flex Gripster Trainer provides 6 different resistant levels. 6.6lb, 8.8lb, 11lb, 13lb, 17lb, and 21lb. You can choose the appropriate level according to your grip strength.