THE CHAIN STORAGE SWIVELS SO YOU HAVE A CONFORTABLE WALKING THROUGH. FULLY ENCLOSED LINEAR BEARINGS WITH UNSUPPORTED GUIDE RODS. THE ROTATING BAR CATCH DESIGN EASILY FITS INTO THE CATCH SLOTS FOR EACH HEIGHT POSITION TO ACCOMMODATE MULTIPLE EXERCISE MOVEMENTS. EASY-GRIP DUAL STOPS ALLOW THE USER TO LIMIT THE RANGE OF MOVEMENT WHEN DESIRED.”