Feels good and helps keep your hand muscles, limber, flexible, strong and busy. Proven to improven to improve range of motion of joints, improve muscle performace, strengthen finger muscles and rehabilitate hand muscles and joints. This twistable therapy device is a new ergonomic approach to stress relief, as well as a manipulative for hand therapy. This larger, smooth tangle is a great addition to the "Tangle" line. Available in translucent blue or multi-colour.