It is a BUGGY wrench. They were produces from the early 1800's to the turn of the century. If I remember correctly, the large square end was used to tighten the axle nut and the and the open end type end was used for the other various nuts. Worth about ten to fifteen bucks.
it is a barrel wrench it is used on 55 gal. and 35 gal. barrels the square end is for the plug on the side of the barrel and the other end open the round plug on top of the barrel it work on all barrrels I work with them about 20 years ago
I am strongly offended by these posts referring to a woman as a w ench! Oooops! left the "r" out! Never mind! (OK, it's just after 4:00 AM and I have insomnia and nothing better to do than post silly stuff)! Forgive me please? JIM