The Eggsercizer is an egg-cellent hand therapy exerciser that works on increasing grip strength. Its unique shape is designed to fit the contours of your hand to promote recovery from injury or surgery. Use the Eggsercizer for a variety of exercises for the fingers, hand, wrist and forearm, and also as a stress reliever. Your patients can improve grip strength, hand endurance, dexterity, muscle tone, and fine and gross motor skills with repeated use. The Eggsercizer is made of a non-allergenic polymer that will not crack, leak or melt. Choose from five color-coded Eggsercizers, each with varying resistance levels for progressive rehabilitation. This Eggsercizer is blue in color and has a medium resistance for a firmer hand therapy experience before you move up to the last resistance.