Specs: Dimensions: 18" x 8" Weight: 1 lb Uses: Helps release knots in back, neck, and shoulders Benefits: Level 3 foam massage balls to relieve pain and improve upper body function Teardrop design to target trigger points Reversible claw tip to massage tense areas GRID pattern to mimic massage therapist hands on larger muscles Access to free online instructional video library included Ergonomic construction to help access hard to reach muscles