Balloon Hook
Most of the balloons and balloon accessories used by the U.S. during World War I were produced in France, as the balloon industry in France had been in full production for at least 10 years prior to the United States' entry into the war. In time, the U.S. was able to begin fulfilling balloon accessory needs, but this was closer to the end of hostilities. The clamp or C-hook end is attached to the balloon basket, while the end with the ring is attached to the rope of an anchor by an S-hook. (U.S. Air Force photo)