This is the self massager with two adjustable angled balls that loosen tight muscles, release trigger points, and improve mobility to relieve aches and pains. Used by professional athletes and physical therapists, each ball adjusts independently to one of five positions to effectively massage your neck, back, core, and limbs. Unlike other ball massagers that can require constant repositioning, the dense thermoplastic balls are permanently mounted and rotate on a non-slip base that allows you to precisely target specific muscle groups. Your own body weight applies just the right amount of pressure to deliver the ideal therapeutic massage. An included adhesive wall mount permits use while standing. 4 1/4" H x 10" W x 7 1/2" D. (1 3/4 lbs.)