[oldspert]

I can see a need for this tool. When using the pin to locate the depression in the timing gear, it takes two hands, one to depress the pin and the other to turn the engine. Without the wrench to turn the nut, turning the engine with the crank is almost impossible while holding the pin searching for the depression. Unless you want to pull the spark plugs and turn the engine with the fan belt, it is a tough job.
Ed