Two types of finger trainers
Widely used
Sports Grip Strength Trainer: For Rock Climbing Enthusiasts, Baseball, Boxing, Tennis, Fitness, Tennis, Golf, Shooting
Musicians finger stretch: guitarists, basists, pianists, violinists.
Physical Therapy: Finger Stretcher for Rheumatoid Arthritis, Stroke Rehabilitation, Tendonsurgery, Tennis Elbow, Stiffness and Pain Relief