Any idea?

[tmays]

I don’t know what this tool was used for. Now go! Lol

 

[John *.?-!.* cub owner]

If both jaws are flat, the first thing that comes to mind is a saw setting tool, but I am not strong on that idea. I have never seen one quite like that.

 

[Urbish]

Glass breaking pliers. Adjustable screw for different thicknesses of glass.

 

[tmays]

Glass breaking pliers. Adjustable screw for different thicknesses of glass.

Thanks! That make sense because the two large jaws don’t move and closing the handles makes a “V” jaw move down into back area of large jaws. Got them in a estate sale in a tool box with other stuff which included two glass scoring tools

 

[coppersmythe]

Glass breaking pliers. Adjustable screw for different thicknesses of glass.

I've cut glass for 30 years , never used one like that , BUT , it makes sense , coppersmythe....................

 

[Peter Person]

Technical name is “Glass Running Pliers”. Can still buy them but most guys just put a pencil under the score and push down on both sides and let the glass run out on its own following the score.
Been in commercial glazing since 1981.

 

[indy61]

I'm with John. Saw set pliers.

 

[Urbish]

John and Indy are correct. They ARE saw set pliers.
https://www.google.com/search?q=antique+saw+setting+pliers