Help Identify this Tool

[odelay01]

I bought a batch of tools recently and this tool was included. I have no idea what it is. Can anyone help me identify this tool? Thanks!

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[sublimate]

It's a tool for pushing the rivet pin in or out of a link of chain.

 

[odelay01]

Thanks!

 

[Wanna Ride]

Commonly referred to as a, "chain-breaker".

 

[odelay01]

I thought that's what it was, but have never seen one of this size before.

 

[Wanna Ride]

I've always found it ironic that the very thing it's made to break, is actually a part of it's own construction.