Tempest Hand Grip And Wrist Strengthener Is A Simple Effective Training Tool For Overall Improved Performance.The Material Of The Hand Grip Strengthener Is Good-Quality Abs Plastic And Useful In Hand, Finger, Forearm And Wrist Exercise.Adjustable Hand Grupper Is Ideal For Athletes, Musicians, Rock Climbers, Golfers, And Players.It Is Suitable For Adult Men / Women, Teens And Kids.