[OrrieG]

My dad always ran these on his jeeps in the 50's and 60's, we used them hard and never had a hub failure. He was buying military surplus so it may have been what the govt. spec'd. I was not ambitious enough to search and see if they are still made or were even available for GM hubs. You flipped the levers, turned them 180 degrees and flipped them back into the slot to engage and disengage.