Here is a horse drawn Adams grader wrench. This brought quite a bit of attention from other collectors.
(http://imageshack.us/a/img35/7403/on7r.jpg)
(http://imageshack.us/a/img96/1296/in5n.jpg)
http://www.suckercreek.org/Daves_Article_Pics/Horse%20Drawn%20Road%20Grader/horsegrader%20002.jpg