I have never seen this before in my life and definitely do not have the adequate tool to remove it.

 

You might check the glove box, the spare tire area, and the tool compartment in the engine bay. The tool is usually a special socket that fits the pattern. Otherwise maybe try an auto parts store. I've never used one on my own vehicle, so I don't know how specific the tools are. Hopefully you'll find it in one of those places.

 

I remove and throw away the wheel locks as soon as I get the car.
Do you plan to run wheel locks?
If not any tire place can get them off in 5 minutes. It's a REAL common problem!
They won't use a key socket either so they are usually messed up when removed.
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You can buy a tool from somewhere like Amazon -
If you don't have an impact then the trick to using the tool is tapping on the end to keep it engaged with the nut while using a breaker bar to turn it.