General description Thanks to their small contact surface, Relaxdays Massage Balls are ideal for trigger point therapy, effectively relieving localized muscle stiffness. This set includes two smooth lacrosse balls for treating superficial tension and two nubbed balls designed for intensive deep massage. The acupressure balls are particularly hard, enhancing the massage effect and allowing for versatile use on various body parts such as the back, neck, shoulders, feet, and hips. Technical specifications Set includes 4 massage balls: 2 smooth lacrosse balls and 2 nubbed balls Smooth ball diameter: approx. 6 cm Smooth ball weight: approx. 170 g Nubbed ball diameter: approx. 6.5 cm Nubbed ball weight: approx. 40 g Material: PVC, rubber Color: black Installation Place the ball on the body part of your choice Lean against a wall or floor Roll the ball over the affected area to locate painful spots Roll slowly over the most sensitive area for approximately 10 minutes For faster relaxation,