Is this a specialized brass reaming tool?

[Prof Steve]

Can someone identify exactly what this tool is? I can make out the markings: MORSE, NEW BEDFORD, MASS USA, 5/32, and then an arrow pointing up to the 5/32, with the word "BRASS" below it. It's a vintage tool from my father's high speed precision screw machine shop in the latter half of the 20th century. Thanks for your input.

 

[LXCam]

It an adjustable reamer.

 

[RoninB4]

^ This. Adjusting the size too large will cause the "blades" to break. Might also be dull if it's been used a lot or for materials that are harder than the intended purpose. They are not a replacement for a standard type reamer (fixed size). It's likely marked "brass" because the blades aren't hardened enough to last long in steel. For brass (softer) they work as they work just fine for removing small amount of material.

 

[Wrench97]

I've used them for years on brass spring bushings king pin bushings, clutch cross shaft bushings etc.

 

[OccupantRJ]

They will also usually have an acceptable general size range marked on them.