This is a French monkey wrench, made in France for nearly one hundred years. You can find similar wrenches in the U.S.A. (brought back from western Europe) as well as at flea markets in France and Germany. Chances are your wrench has the word "Acier" (steel, in French), or the word Goldenberg or other Alsatian name on it. These wrenches come in all sizes. The three I have range from 6.5 inches in length to 17.5 inches in length. The big one was sold to me in Pennsylvania as "a clamp". These wrenches demonstrate what is so great about America. During the century France has been making and using these wrenches, American genius has produced the myriad of wrench designs we all collect.