It must be Friday-Fabricated-Seldom-Used-Tool Day. The mystery tool from Halifax Homemade, that I put on here earlier, is for getting at the distributor hold-down bolt when you're timing a car that has the distributor up against the firewall.
We (MAC Tools) used to have 2 catalog pages full of distributor wrenches. Other than the universal one, I haven't sold one for decades. They haven't been available for that long as well. LOL