Heath Spiky Massage Ball: Spiky massage ball can relax tight and uncomfortable muscles, reduce tension, promote and eliminate . Trigger Point Massage Ball: Made of TPR material, excellent elasticity and strength, good touch feel, hollow soft ball, no deformation when pressed at will. Small Size: Small size, light weight, pointed design, help exercise fine and rough motor skills, and can also be used for massage. Relieve Muscle Soreness: A hand massage ball, can perform grip exercises, fingers training, wrist muscles, assist in rehabilitation training after injury, and reduce stress. Office health products for keyboard workers can improve grip, hand endurance, flexibility and muscle tension. Promote : Using the grip ball for exercise can reduce nodules and tightness, relieve muscle soreness, improve sports performance, and increase flexibility.