How does the massage roller stick work? Simply hold the two handles and roll the massage tool over affected areas applying as much pressure as you wish. In doing so the self-massage stick simultaneously compresses and stretches the targeted muscles providing relief from soreness, increasing circulation and eradicating tension. Pre-workout use the massager to warm up muscles to prevent cramping, knots and stiffness during exercise. Post-workout the roller stick will help promote the flow of blood and nutrients to tired muscles reduce pain and increase mobility and flexibility thus preventing injury. Features: Soft handles are easy for holding. Spiky balls to massage muscle groups with ease. Easy to search the trigger point to reduce muscular aches and pains. Perfect for athletes, runners, gym rolling, sprinters, elite fitness, marathons or even beginner athletes. Material: PVC Spiky Ball + PP Handle Length: Approx. 52cm/20.47" Balls Diameter: 6cm/2.36" ;