★ They feature a a tough cast metal shell for a secure fit a double lock system for safety and can attach to virtually any chin bars.
★ Pair of inversion boots for reducing back pain, spasms, and muscle fatigue
★ Fights compression fatigue from jogging, aerobics, cycling, and other exercises
★ Helps space out compressed discs and stretches your back, neck, and shoulder muscles
★ Single-action locking mechanisms attach to virtually any chin-up bar.