Do you struggle with tendinitis in the bony wrist or elbow areas? Then it's time to pull out the Grey Roller. Its three rubber 1" balls are soft enough to give around bones and not be too hard on the thin sheathing around your tendons in the wrist and elbow. Of course, you can also use this attachment for your two standard therapies, circulatory massage and trigger point massage. Wear a thin long-sleeved shirt or lubricate your arms with massage oil when using this roller for the most comfortable experience.