GD Grip Pro-E, Adjustable Hand Gripper, Grip Strengthener (Resistance : 17 to 79 lb) Compact and Durable Hand gripper for men and women of all ages (Adjustable from 18lbs upto 79 lbs) GD GRIP PRO-E is a hand gripper which is able to adjust the resistance with simple operation. It is easy and simple, no worries about noise and defect. The GD GRIP PRO-E enhances your hand strength daily and prevents you from dropping your dumbbell or dropping from pull-up bar due to lack of hand strength when exercising pull-up & dead-lift. It is basic item for climbing, boxing, golf and even playing instruments. *GD GRIP PRO-E is protected by PATENT issued by the US government (PATENT NO. US 6,881,177 B2). Quickly increase hand wrist finger forearm strength with the best hand exerciser. It is made by Nylon as hard as steel and the spring is durable compression spring. Very durable and It is never broke easily just like cheep hand grip strengtheners. You can exercise with it anytime, anywhere you want. It is noiseless so you can work out with it even in the library or office. Soft foam on the handle will protect your hands. Best hand grip for rock climbers, bodybuilders, baseball players, golfers, tennis or badminton players, drummers, guitarists, pianists, massage therapists and violin players. Also beneficial for people who have arthritis, tennis elbow, rheumatoid arthritis, and carpal tunnel syndrome.