What is it

[nikh]

Hi again. I've had this for a couple years now, and it gets used every now and again. This is just another fun guessing game for an old tool.

 

[Superbec]

"finger" shortener ?

 

[yhprum]

rivet shear?

 

[cvairwerks]

Shop made screw shear.

 

[CwazyWabbit]

If the holes are tapped then screw shear, if not then rivet. Nicely made

 

[nikh]

That was fast. It is a Chicago Pneumatic rivet shear that was NOS from Brewster aircraft. Still coated in cosmoline when I got it.