Made of ABS, designed to increase the strength of the fingers, wrists and forearms, exercise each finger trainer individually, or the entire hand arm strengthener. Isolates and exercises each finger individually for strength. Develops outstanding hand trainer, wrist and forearm strength. Perfect for beginners and those recovering from surgery our carpal tunnel the light resistance trainer offers 3 lbs. of tension. The medium level has 7 lbs. of tension, and the heavy hand strengthener has 11 lbs. of tension. Can customize your logo on it.