Pack of 2 hand trainer grip ring To fit perfectly in your hands, we have also upgraded the size of these grip rings. We have increased the diameter to 7.5 cm and the thickness to 2.2 cm. This puts more pressure on your muscles and forces them to work more intensively. A hand trainer grip ring has two levels of strength, from 20 pounds to 50 pounds. Over time, this will improve your hand strength and promote muscle growth! Durable highly elastic siliconeMade of food-safe silicone, it is extremely durable and quickly retains its original shape after squeezing. You can rest assured that this hand trainer grip ring will give you long-term and reliable use. Special and ergonomic designErgonomic design that fits perfectly to your palm. Thanks to the surface structure, our hand trainer grip rings ensure a pleasant touch feeling and non-slip function. During use, it can also stimulate the acupuncture points and help relieve the pain and discomfort after using the keyboard and mouse. Pocket size for easy carryingUnlike most other training sessions, you can take these hand grip rings with you and train anywhere. Exercises can be done at home or in the office in just 5-10 minutes a day and turn your leisure time into a productive training session. Hand training device suitable for everyoneThe resistance range from 20 to 50 lbs offers everyone the opportunity to train from beginners to professionals with the hand trainer grip ring. It is simple and efficient and helps strengthen grip, relieve stress and increase endurance.