Features1Can help you increase blood flow and tissue hydration, reduce muscle pain, improve athletic performance, increase flexibility. 2Hollow soft ball, lighter than ordinary massage ball, better grip feel and comfortable to hold. 3Soft thorn on the ball surface can stimulate the hand, but will not sting all cause pain feelings. 4Suitable size, designed with rope that can be adjusted and is not easy to fall when holding. 5Can exercise hand muscle and finger flexibility, suitable for primary strength training and rehabilitation training.SpecificationCondition: 100% Brand NewItem Type: Grip BallMaterial: TPRDiameter: Approx. 7cm / 2.76inRope Length: Approx. 15cm / 5.91inHardness: Hollow soft ballGrip ball, also called pressure ball, stress relief ball, is also a fitness ball.Can exercise hand muscle and finger flexibility, suitable for primary strength training and rehabilitation training.Use method:Basic exercise: hold the ball completely in the palm of your hand and do 10 times hand stretching exercises, first with your right hand and then with your left hand, alternatingApplicable people:Climbers and bodybuilders training finger and grip strengthFans of badminton, table tennis, basketball and other ball gamesLearn to play the piano to exercise finger strengthFor people use computer keyboard and mouse for a long time Package List1 x Grip Ball