2-IN-1 DESIGN - There is a smooth side and a textured side in two different resistances for targeted needs (Blue 40/50 LB, Orange 50/60 LB, Black 70/80 LB). You can reference the grip data on the strengthener to increase the strength of your hand gradually to get the progressive workouts.VARIETY OF ACTIVITIES - You can use the hand grip ring for crushing, punching, stretching, doing rehabilitation and relieving stress. Help strengthen your hands, fingers, wrist and forearm. Really suitable for athletes, musicians and physical therapy.HIGH-END MATERIAL - Made from premium silicone material, which is waterproof, in a high resiliency and easy to clean. Besides, it also provides a comfortable grip.PERFECT SIZE - With a diameter of 7.5cm / 2.9 inch, is not only suitable for male and female with average hand, elder and youngsters., but also is comfortable to hold on.CONVENIENT - It is portable and you can put it in your pocket or handbag so that you can use it anytime and anywhere.