DescriptionThis is a hand grip strengthener, which through building strength in the fingers, hands, wrist and forearms. Varied activities, including crushing, pinching and extensions, work to improve the dexterity of both the fingers and hands. Perfect for athletes, musicians and patients.Features-Color:Random Color -Material:PVC -Size:7.00X7.00X2.00cm/2.75X2.75X0.79in(40kg) -Size:6.50X6.50X2.00cm/2.55X2.55X0.79in(30kg) -Size:6.00X6.00X2.00cm/2.36X2.36X0.79in(20kg) -These hand grip strengthenerrings are durable and safe, you could keep it for a long time.-Our hand grip strengthenerowns the strong wear, tear and break resistance ability.-Good performance and practical hand grip rings are always provided by us. Suitable for tennis player, mountain climber, rocks climber, musician, guitar player, violinist, etc.-This is a creative and generous hand grip strengthener , with round appearance and practical design.- The hand grips exerciser is easy to use, you can just simply hold it firmly with your palm and fingers then release and, repeat this process, exercise at the place you like.