The Chirp Wheel XR 6” Knot-Kneading Thumb Massage Wheel is uniquely designed to dig deep so even the most stubborn, deep muscle knots won’t stand a chance. You’ll feel the immediate effects as you roll out on this wheel with a unique texture designed to mimic a deep shiatsu massage. People are saying it's basically their at-home massage therapist. Targets extra deep tissue knots Unique shiatsu massage texture 360-degree trigger point targeting Spinal Canal™ protects the spine from pressure