Back in the 1950s and 1960s Corvettes that were manufactured as convertibles could also be optioned to include a removable hard top. The rear deck could be raised and the standard rag top could be folded into the space behind the seats. With the rag top stored below the rear deck, the removable hard top could be installed. It's a two person job for sure, and a PITA to say the least. The back of the hardtop was connected to the rear deck via two special screws that protruded from slots beneath the plexiglass back window through the rear deck and were tightened with 7/16" nuts. The sides of the hard top connected into screw bosses located in the body of the car just behind the passenger and driver doors. Two little tabs protrude from the hard top and line up with the bosses. A 1/2" screw connects the tab to the screw bosses. Like I said earlier, it's a real PITA to put the hard top on the car. Anyway, to accomplish the task, the engineers at GM thought it would be nice to include a little 7/16" X 1/2" DOE wrench with all removable hard top optioned cars.
Having performed the hard top removal / installation more than a few times, I can say that the GM provided DOE wrench is almost worthless. I've discovered that using other tools, and a helper, make the job a lot easier. That being said, the original factory supplied wrenches are tough to find. I suppose many of the the original wrenches found their way out of the glove compartment and were lost. Anyway, the wrench depicted below is an original GM supplied tool that was included in 1963 - 1967 Corvette convertibles with the hard top option. Notice it was made by Vlchek. This particular wrench was found under the passenger seat of a 1966 Corvette, lodged in the track. For some reason, the seat would not slide in its tracks, preventing the passenger from moving it forward and backward. After removing the seat, this is what I found.
Jim C.