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).