IronMind Green Egg (Soft): Put This Potent Hand Strengthening, Stress Reduction, Rehabilitation and Active Rest Tool in The Palm of Your Hand
Use for warming up before tackling your Captains of Crush grippers, or for rehab/active rest. Can also be used for relieving tension, lowering blood pressure and breaking bad habits. Made in the USA, by IronMind, the industry leader since 1988