GM Co. Socket Set

[kxxr]

I'll bet we've all seen pieces and parts of these things littering the bins everywhere we go and wondered what these little US made sockets go with. Usually, the ones I see are unmarked but these are stamped "GM Co." and it's the first complete set I've seen so I grabbed it. I figure there are lots of different configurations that these little hex drive sockets came in, but here's one that is 'all there', or alt lease almost all there.