Funky Rear Axle. Need help Identifying I recently bought a Globe Work 2, and I'm digging it, but I'm at a loss for what is going on with my rear axle.  I took a couple of pics (below), so I'm hoping someone can tell me what I've got.

According to the spec sheet, I'm supposed to have "REAR HUBDouble-sealed, loose ball, dual-lock nuts, steel axle, QR, 32h", but that doesn't look like a QR to me, and I don't know what dual-lock nuts are.

So, any ideas about what this is?
Looks like an attaching point for some kind of trailer, maybe a single wheel trailer.