Hand drill / auger???

[phillie]

It is marked SUPREME, and is made of brass and metal. The tool is 5” long and comes with 3 cutting heads. The cutting heads are approx ¾, 5/8, and ½”. The brass cone shape piece slides up and down the shaft and can face either direction. The cone is hollow and the inside has a threaded design similar tot the outside.
I have no idea what special application this tool was used for. I bought it from an estate with many other vintage tools. If you know anything about it please share with us.

[superzstuff]

Sink faucet washer reseating tool. I have used one of these. They smooth out a rough place where washer seals. Many steps for various size openings. Different cutters for different size washer seats.

[Aunt Phil]

Technically a valve seat refacing tool.

[phillie]

Boy was I way off. Not very exciting but thanks for the info!!

[rusty]

>Not very exciting but ....

It gets very exciting if you have forgotten to turn off the water before removing the faucet core...
(do not ask me how I know this)

[scottg]

Surprisingly not that easy to use.
 Leaks (dripping faucet) are mostly tiny thin cracks or lines in the surface of the seat. These cause you to have to crank down hard on the faucet and this wears the washer out very quickly, and it drips anyway.

  The steps in the big brass part are for centering the tool in the exact middle of the valve. Your job is to keep it perfectly parallel as you crank and smooth the surface of the seat.
 If you let it slip by a degree or more the washer will seat at first, but it will wear very quickly.
 If you get it smooth and even you can extend the life of the valve by years.

  Many of the great old faucets have removable seats.
  If you can find them, spinning out the seat and spinning in a new one, is terrifically satisfactory.
  If you do find replacement seats for your bathtub faucet forinstance, buy at least 10 of them! .................. and get a can of neverseize.
 Coat the threads of your new seat in Neverseize as you install it, and it will spin right out come replacement time. 

 Oh, a tool you will want is a seat wrench.
These come with graduated squares at one end and hex's at the other. This looks like the perfect tool as the holes in all seats are either square or hex
 NOT!!!   They always strip out the seat. Always!!!
 
 The one you really want is a smooth tapered oval at each end. These never fail. Give it a tap with a hammer and it will bite!!!!
  yours Scott

[bonneyman]

Surprisingly not that easy to use.
 Leaks (dripping faucet) are mostly tiny thin cracks or lines in the surface of the seat. These cause you to have to crank down hard on the faucet and this wears the washer out very quickly, and it drips anyway.

  The steps in the big brass part are for centering the tool in the exact middle of the valve. Your job is to keep it perfectly parallel as you crank and smooth the surface of the seat.
 If you let it slip by a degree or more the washer will seat at first, but it will wear very quickly.
 If you get it smooth and even you can extend the life of the valve by years.

  Many of the great old faucets have removable seats.
  If you can find them, spinning out the seat and spinning in a new one, is terrifically satisfactory.
  If you do find replacement seats for your bathtub faucet forinstance, buy at least 10 of them! .................. and get a can of neverseize.
 Coat the threads of your new seat in Neverseize as you install it, and it will spin right out come replacement time. 

 Oh, a tool you will want is a seat wrench.
These come with graduated squares at one end and hex's at the other. This looks like the perfect tool as the holes in all seats are either square or hex
 NOT!!!   They always strip out the seat. Always!!!
 
 The one you really want is a smooth tapered oval at each end. These never fail. Give it a tap with a hammer and it will bite!!!!
  yours Scott

This is why I hate plumbing!
If you want quality plumbing tools, look up PASCO Specialities. They manufacture alot of good tools and repair gizmos that DIY plumbers can use. Don't ask me how I know.