Can anyone name this tool?

Anyone got any idea what this is? Or what its used for?

Found it in a box today

 

If it's got a square hole in the other end it's a radiator bleed key

 

Hi it's for screwing up wing nuts

 

I name this tool Arthur.

 

Spoke key

 

It's for little wing nuts

 

is it a flap twister

 

Flange regulator.

 

It's a left handed widget...

 

butt plug removal

 

David Cameron............oops wrong picture!

 

They come in a pack. Your missing the M C A.
It's fun.

Edit.
I wasn't actually here to say this. ^
Nope

 

is it a mini allen key wrench? 4, 5 or 6mm? to twist finger tight?

 

It's a key for piano tuning.

 

Carl Perkins