Features:1. The Grip Ring is an extremely effective solution to build grip strength、 improve hand motor skills and increase circulation2. They are portable、 easy to use and are ideal for developing strength and stamina safely and effectively while reducing stress at the same time.3. The shape of the grip is therapeutic、 comfortable and easy to use.4. It is recommended for users of all fitness levels5. The grip ring is the perfect portable solution for training grip、 hand and finger strength6. Simply place the ring in the palm of your hand with your fingers closed tightly around the ring. 7. Then squeeze、 hold and repeat8. Use these anywhere and anytimeDescription:Material: RubberColor: Sent randomly with same functionInner Diameter: Approx. 30mm\/ 1.2!#!amp!*!quot;Outer Diameter: Approx. 65mm\/2.6!#!amp!*!quot;Thickness: Approx. 17mm\/ 0.7!#!amp!*!quot;Quantity: 1pcsPackage Included:1 x 35kg Heavy Grip Finger Hand Gripper Ring