I need help identifying this 5 1/4" wrench with a "290" boss wrench on it. It was found in Sussex County, Delaware.
The wrench's closed end openings and its one open-ended opening, are heavily reinforced as can be seen from the backside view. There is an unusual blade coming out of the closed end.
The wrench has 2 reinforced hex openings, 5/8" and 3/4". The hex openings are 9/32" thick. The square opening is 1/2", and its reinforced jaws are 1/2" thick. The external portion of the blade is 3/16" long, 1/2" wide, and 1/16" thick.
This is a special function wrench if I ever saw one. What do you wrench experts think this one was used for?