Carb adjusting tool
I don't know about Herbrand, but other mfg. made these and the tool came with specific 1/4" drive sockets for different carbs---slotted recessed flat blades, Allen head etc.
Indestro Tool Catalog 55 1972 pp 64-65 specialty tools by four.cycle, on FlickrI can't speak to the Herbrand, but I can say that the Indestro 2820 set didn't sell worth a damn. I think we sold maybe three or four in ten years.
Might have something to do with the reason they're not often seen.
wasabiboys said:can see why sorta a useless tool unless tuning an old car
when I was selling them those "old cars" weren't that old.