Hand grippers are small tools that you squeeze with your hand to improve your grip strength. They are designed to help strengthen the muscles in your hand and forearm. Full definition
It can be improved by using hand gripper, and the exercises mainly improve the forearm flexors. (fitnessandpower.com)
This usually includes; forearm flexion and extensions, farmer's walk, dead hangs, and the use of hand grippers. (ptinto.com)
The good thing about hand grippers is that you can get them in increasing resistance which is the key to increasing strength and muscle mass. (fitnesscrest.com)