I posted two of these jack stands in this thread five years ago and yesterday I purchased two more at the same Habitat store. They wanted twice as much money this time around, but I'm happy to have a set of four. I'll make plywood bases for the new two too, since I use them on gravel, or soft plywood on dirt (carport floor).
I think the first pair are newer, based on the labels, but haven't looked at catalogs to compare part numbers. I'm guessing the AX-2 turned into AX-20 and then 67368. I find it interesting that the first pair are rated for 2 tons each, whereas the other two say 2 tons (pair). Yet, they're basically identical in terms of construction. Regardless, they're plenty stout to suit my needs.
Tom