Description: DURABLE: The hand exercise grippingstrengthener, made from silicone material, suitable for stretch and pull,durable.FEATURE: Perfectly sized for grip strength training for men, women, seniors and teens.FUNCTION: Finger exerciser with portable storage pouch is designed to strengthen your wrists, fingers, improve the dexterity of your fingers and increase the strength your hands.WIDE USAGE: The hand grip trainer, great for improving power and flexibility in the wrists, fingers, and forearms.GIFT: Great for athletes(tennis, basketball, boxing, golf )and musician (guitar players, bass players, pianists and violinists), computer workers. Specification: Material: Silicone Size Chart: Fingers toys: 8.1cmx3.7cmx0.25cm or 3.19inx1.46inx0.10inCircle Diameter: 6.8cm or 2.68in thickness: 1.8cm or 0.71in Package Includes: 9 Hand Grip Exerciser Strengthener Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.