Help Identify this Mac Tool! Sensor wrench?

[Wi Fire 10]

This was in a box of tools that I bought. It is marked Mac Tools. It has a 1-1/8'' inside span, and is 1/2'' drive. Can anyone tell me what this is used for? Is it a sensor wrench? Why cant I find anything about it through a google search? What do you think it is worth on Craigslist/ebay or on the classifieds section of GJ? Im looking to sell it, at a reasonable price, to someone who will have a use for it. Thanks for your help.

 

[Darius6t9]

Looks sorta like a weaterhead socket for hydraulic fittings. I am probably wrong though.

 

[crewchief888]

no clue, sorta looks like an O2 sensor socket

 

[454ragtop]

Might be to remove inner tie rods from a steering rack, for what car, I don't know.
Jim

 

[CD1]

It's a widget remover.

 

[Mike.ASC]

It's a strut rod adjusting nut socket for old Fords