Target Areas: Specifically designed for calves, thighs, arms, and the back of the neck.3D Floating Points: The spiked "wolf tooth" texturing on each wheel mimics a manual trigger-point massage.Ergonomic Frame: The flexible plastic structural ring stretches open and springs back to accommodate various limb sizes and apply consistent pressure.Primary Use: It helps to relieve muscle soreness after exercise, improve blood circulation, and reduce the appearance of cellulit