1.exercise hand grip ,finger gripper 2.power grip,gym,health,training grip 3.fitness equipment, heavy gripper, 4.sport item ... requirement3,Ergonomically designed palm and finger grips4,Dramatically increases hand, palm,finger,wrist and forearm strength5,Increase control, ... distance and feel, good endurance quality6,increase grip strength, endurance, and blood circulation to the forearms ...