What is this tool thread? Take a guess. Stump the Toolman!

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I actually have one of these
s-l1600.jpg
 
Probably not a tool, but what is this? Its been in my tool box for years and I've shown it to everyone I know.

DSCN5091[1].JPG
 
Like I said a hard one. Common on alot of carbs. It is a remover and installer thats the hint
 
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