Therapist's Choice Adjustable Resistance Hand Exerciser Grip Strengthener Color = YELLOW: Adjustable Resistance Range from 10 to 45 Pounds Ideal for Physical Therapy Rehab for people who have arthritis, tendonitis, tennis elbow, rheumatoid arthritis and carpal tunnel syndrome Perfect for Grip Strengthening and building finger, wrist and forearm strength Beneficial for rock climbers, body builders, golfers, tennis players, drummers, guitarists, pianists, massage therapists, violin players. Easy to Use and Adjust, Color = YELLOW: Adjustable Resistance Range from 10 to 45 Pounds