This old wrench is about 14 inches long and weighs in at over 3 pounds. It has two openings forged on the large end, roughly for 1-inch and 1-1/4" fasteners, measured across the flats. Arranging them like this is a neat idea. The other end has openings for 5 different sizes. It was probably made for adjusting some very large machine, whose history is lost in the mists of the industrial age.