Hand Grip Strengthener with Adjustable Resistance Range from 22 to 88 Lbs (10-40 Kg) – Excellent tool to increase strength of hands, fingers and forearms – Ideal for Athletes, Sports enthusiasts (Golf, Tennis, Rock Climbers, Body Builders, etc.), Musicians (Drummers, Guitar, Violin and Piano players, etc.) and people looking to recover from injuries such as Arthritis, Tendonitis or Tennis Elbow – Small size and light weight allow for easy traveling – Exercise anywhere and anytime!