A 4wd spindle nut socket. Looks like a 3-4" long pipe with 4 tabs sticking about 1/4" out from the end (they go in the slots) and a 1/2" drive socket on the other. Man, any decent auto parts store should have one, but decent auto parts stores are getting harder to find. Maybe now that you know the name they will be able to find one, if not look around for the grumpiest, meanest, Oooooold parts guy you can find (try for quadruple digits). He'll probably call you an "ingnernt young punk" (even if your 50) , but he'll know what you mean. Darn near every Napa I've ever been in has one on the wall somewhere.
"My other car is a BULLDOZER"
"My other car is a BULLDOZER"