What are these?

[Jonathan Jung]

Anyone know what these are from? I have no need for them if anyone wants them.

504166
504167

[Bill Dufour]

Look sort of like the cheap fences on tile cutting table saws.
Bill D

[Phillip Mitchell]

Shaw guard or similar safety / hold down parts for a shaper / spindle moulder?

[Bradley Gray]

Board stretchers

[Rich Engelhardt]

They remind me of some kind of miter stand bracket (https://www.google.com/search?rlz=1C1SQJL_enUS890US890&q=miter+stand+brackets&tbm=isch&sa=X&ved=2ahUKEwjEtMGa_IiAAxXYJTQIHVFxDHEQ0pQJegQICBAB&biw=1920&bih=929&dpr=1).

[Dave Sabo]

I think they’re siding layout jigs.