THESE SAFETY HARNESSES FOR CLIMBING AND CONFINED SPACES HAVE ONE D-RING ON THE UPPER BACK ONE D-RING ON THE CHEST AND TWO D-RINGS ON THE SHOULDER STRAPS THE CHEST D-RING ALLOWS THE HARNESS TO BE USED WITH A LADDER-CLIMBING SYSTEM TO PROVIDE FALL PROTECTION IF THE WEARER SLIPS WHILE CLIMBING OR DESCENDING A LADDER OR TALL STRUCTURE THE SHOULDER D-RINGS CONNECT TO A LANYARD SPREADER THAT DISTRIBUTES FORCE EVENLY ACROSS THE BODY AS THE WEARER IS RAISED OUT OF OR LOWERED INTO A CONFINED SPACE THEY A