Magical grip stimulates hands and knuckles. It can be used for a wide range of purposes, including rehabilitation (occupational therapy), brain training, and strengthening fingertips and grips. Also great for nursing prevention and rehabilitation. The shape is an egg type, so the range of motion and load of your fingers will vary depending on the direction of your grip. It can be used more than a spherical type one. It can also be used as a stress ball to change mood between work.