FDA REGISTERED 510(k) DEVICE: Teeter is the ONLY FDA registered inversion table. Indicated for back pain, muscle tension, herniated disc, sciatica, muscle spasm, and more (see below) PREMIUM FEATURES: Acupressure Nodes (8) in varied heights for trigger-point release and focused relief. Lumbar Bridge with adjustable arch for added traction and support UNMATCHED COMFORT & SUPPORT: Patented wrap-around ankle cups are made from specialty foam. Contoured Bed with Hand Grips flexes for comfort and optimizes stretch for maximum relief PRECISION ROTATION FOR TOTAL CONTROL: Shift your body weight with just simple arm movements for easy return to the upright position HIGH GRADE MATERIALS FOR RELIABILITY: Heavy-gauge steel parts with patented security features like auto-locking hinges, cam locks, specialized pivot bearings for durability