Exercise: This hand enhancer is suitable for sports, fitness, home, workplace, and office use without disturbing people around.Portable: Our design allows you to put it in your pocket, or gym bag, so you can carry it in your hand anytime, anywhere.The Metal Hand Grip Strengthener comes in two different sets. from 50LB-200LB by screw cap.Strength recovery: If you have been injured , you can wrist exercises to strength. It can also be used for childrens strength training, improvement and musicians strength training.for all people: not only suitable for rock climbers, fitness, golfers, surfers, tennis players. In addition, the simple and convenient design makes it an Perfect training accessory for teenagers, adults and even the elderly who to maintain their hand grip Colour:silverMaterial:MetalPackage Contents:4 x Grip Strength TrainerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.