I got these things with a bunch of stuff at a school auction. I'm not quite sure what they are.
I think the device on the 2x4 is a valve cutter... the silver colored metal holder has a carbide cutting edge clamped in it. Even then, I'm not sure how you'd make it work.
The item with the two grooved rollers is an enigma... both the rollers have a pitch to them.. one of them has about a 3/16" hole in the free end... I'm wondering if it's a spring winder of some kind.
The piece with the small rollers is another unknown. One of the rollers has a slit in it, and the shaft for it is worn flat to about half it's original diameter... maybe something for use with flat springs???
The punch like objects have a shallow groove running the length of the head... they say "Pexto" on them so I assume they're for sheet metal though I don't know just what their purpose is...
Anyway, any help would be appreciated.