The Torque Ball Metal Self-Starting Gyroscope Hand Exerciser is a portable and customizable relief tool designed for adults. This hand exerciser, made of metal, provides targeted therapy for gym training, weight lifting, and yoga. With a unique 5-level color-shifting lens and a weight of 0.86 pounds, this Torque Ball offers a convenient and effective way to relieve pain and improve muscle strength. The self-starting gyroscope Technology ensures that you are getting a full workout with each use, making it a great addition to any fitness routine. New open box