Squeezing the Adjustable Exerciser will work all of the muscles in your fingers, hands and forearm; Suitable for all abilities as the resistance can easily be adjusted between 10-50kg - increase the resistance as your strength develops; Great for improving grip strength, hand endurance, dexterity, muscular tone and fine and gross motor skills; Easy to clean and store,the lightweight design of the handgrip makes it ideal to pop into your bag for use whilst out and about; Effective tool for injury prevention, injury rehabilitation, improving sport performance, improving ability to perform everyday tasks and for stress relief; Quickly increase hand wrist finger forearm strength with the best hand exerciser,Ideal for rock climbers, bodybuilders, golfers, surfers, tennis players, drummers, guitarists, pianists, massage therapists, baseball players and violin players.; Also for people who have arthritis, tennis elbow, rheumatoid arthritis, and carpal tunnel syndrome; They train your fingers, hand grip and forearm effective. That leads to better workouts, and you can avoid several injuries; Ergonomically designed to fit small to large hand sizes. Perfect for men, women, seniors and teens.