What is it?

[Sawdust Man]

looks like old-skool jet pump parts, kinda works like the stack impeller plate thing on a shop vac

Yep..... pump guts.

 

[Sawdust Man]

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Them are really nice ones!......what are they?

 

[Sawdust Man]

Looks like a tool that can be used on model airplanes to create rivet lines. I am sure there are other applications, maybe even perforation lines on something.

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Those are lather working tools, specifically the roller ends are stich markers that you trace along a pattern for a certain # stitch count. Ive also seen them used to transfer a chalk pattern to a soft material or fabric.

The larger wheel might be a perf cutter for leather as it kind-a looks sharpened, but I have never seen such an animal nor can I think of a reason to perf cut leather......just a bigger space stich count IMO

They're very light weight aluminum, (about like an exacto knife), maybe kinda light duty for leather work? but......Idk nothin.

 

[dangerousatom]

Google search : “leather overstitch wheel”

They are only to mark the stitch pattern not punch through the leather. They are good for marking tight curves. A stitching fork or “pricking iron” is used with a hammer to go right through the leather for stitch hole making on straight runs of multiple layers of leather.

I’ve sewn me a bit of leather in my day

 

[Only the Tony]

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Raker gauge set for crosscut saw.

 

[singinwoodwackr]

No clue.....

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Leather