Introducing our Hand Grip Strengthener, a powerful tool for improving hand, finger, wrist, and forearm strength. Designed to provide relief and support to individuals with conditions like Arthritis, Tendonitis, and Carpal Tunnel, it is also highly beneficial for musicians, athletes, golfers, rock climbers, and tennis players. With an adjustable knob, you can easily customize the spring tension from 11 to 132 lbs (5-60kg), allowing you to progress and challenge your muscles. Orders of 1000 pieces or greater are eligible for sea shipping. 100% guarantee for quality.