This obstruction wrench has the sizes forged into the shank. In the center of the shank is stamped Wilde K. C. MO. 163-L. On the reverse the sizes are again forged into a depressed panel on their respective ends, and "Chrome Vanadium Steel" is forged into another depressed panel in the center of the shank. This wrench very closely resembles the Truth Half Moon Obstruction Wrench. The maker of these wrenches is still unknown.