Unknown goodell-pratt company tool

[He11jumper105]

Only thing I know is there is a note that says the following are checked and correct 0001 of an inch. There is one small circular thing with a roughly 10 in handle that screws into it and 6 various-sized bars that attach somehow.

[gibsontool]

My guess would be a device to measure the inside diameter of a cylinder. Would be used with an outside micometer.

[turnnut]

 I agree, but you would not need the outside mike, the rods are machined and checked for certain lengths, the micromere is the handle
 that reads the same as a micrometer, but you add the rods lengths to the reading.

[Chillylulu]

They look like reamers.

When drilling (or boring) a hole to a tight tolerance you drill it undersized, then you ream it to the exact size.

Machinist tools, I would say.

Chilly

[bill300d]

not sure which set but these

[lptools]

Hello, I agree with turnnut & bill. The photo is blurry, so I am guessing what we see is rust, and or , discoloration on the rods, that gives them the look of being ridged. . Regards, Lou

[Bill Houghton]

Yep.  Inside micrometer.  I somehow own two sets, neither of which I've ever used; but I'm ready, if ever called on to, say, measure the inside bore of a steam cylinder on a locomotive.