What is this called..?
 

Im sure this the correct socket for my rear axle nut. (190e) What is this tpye of socket called?

http://bfyobsoleteparts.com/volkswagen/files/master/thumbs/t_9531.jpg

Looks like "Shaft bolt socket".

12-point

Large sockets like that are available at any auto parts store (Napa, Advance, Pep Boys). They are sold specifically for removing the hub nut -- and as such are probably called "hub nut" or "axle nut" sockets. They should be available in a number of sizes in both metric and SAE. Just measure the nut on your car, and go buy the corresponding size.

Good luck.

Jeff Pierce

Ty!