The auctioneer called it a "scraper".....

[dimwittedmoose51]

Handle looks home made, but the metal stuff looks like tool quality steel.  Maybe some sort of lathe tool, but to do what???  Snuck in the pair of 4" Crescents that went with a bundle of punches for $4....  the scraper was a a dollar and was thrwn in with a bunch of other "hard sell" items, like a Bosch hammer drill chuck...go figure....

TIA

DM&FS

[amertrac]

were the adj. wrenches crescent or other mfg?   bob w.

[john k]

Could these be wood scrapers?   The numbers seem to be the radius of the cut out.  Think about smoothly scraping the top of a wooden hand rail.

[geneg]

Could just be radius gages , used to verify the curve of a turning or the corner of a workpiece.  Probably shop made in lieu of the thinner manfactured sheet metal ones.

[gtarmkr]

It could be some kind of clamp for clamping a radius object. They are marked with the radius. I used to use radius scrapers to make guitar neck fingerboards, but these are to round for that.

[oldtools]

If those are 4" Crescents, then the base is about ~3" x 3" x 1/2"?
kind of thick for scrapers, also the piece with 4 radius, how thick is it? sharp edges? does it attach to the bottom of the ones with handles?
one angled & straight base? that a scraper blade clamps to holder?

[scottg]

I have no clue really.
But one time I did make handrail scrapers for standard industrial handrail. These get all crunchy and awful with multi layers of paint so you need to smooth them out, at least a little, before repainting.
 
 I --did not--  use 3/4" plate steel though!   
  I used pieces of old handsaw blade, of course. 

 Your piece was marked 1 1/4 and 1 1/2, and that is what made me think of handrails.  Its the size they are.
  yours Scott

[dimwittedmoose51]

Thanks Scott

DM&FS

[scottg]

They do look rather exactly like arbor press plates. Right size and shape, mostly.
 You use these in pairs to like up on a bearing to press it out or in.
 But those handles are just too weird. I can't imagine what press plates would need a handle for?
 Maybe a repetitive industrial job?
   yours Scott