This is a nice clean 17" long, 1 1/16" open end structural wrench marked "ARMSTRONG 1 1/16-907 HARDENED". Overall it's in very good condition, with some light pitting on the area around the word hardened. For USS size bolt 5/8" according to the 1948 Catalog. Very heavy duty, weight is 2.5 pounds. A vintage wrench that helped build America!