This is the replacement door shelf retainer bar end cap for your refrigerator. An end cap connects to the lower shelf bar on either side, and then snaps into position on the refrigerator door, allowing you to store items in the refrigerator door. To replace the end cap, simply disengage the whole bar assembly from the refrigerator door, then disengage the hook on the end cap from the rest of the bar assembly. Then, simply snap the end cap back into place, and connect it back to the refrigerator door. This part is sold individually.