Stupid question- what is this used for?

[Steve R]

I got this bit mixed in with some others I aquired. Thought maybe for chamfering a specific size hole. It is about 3/16 dia.
Thanks

 

[Ulma Doctor]

looks like a plug cutter, but i could be mistaken

there are no stupid questions

 

[mmcmdl]

Looks like it could be used to cut around a broken SHCS for digging it out . Just a WAG on my part .

 

[matthewsx]

Vampire Bit

 

[extropic]

Is there a central hole all the way through (can't tell in the photos)?
Is there a tapped hole/set screw (radial)?

 

[Steve R]

No hole, the other end looked like like it had a drill end at one time but is broken off.

 

[whitmore]

Maybe a pad cutter? Printed wiring board material (copper-clad fiberglass reinforced plastic) can be
crafted for prototyping by cutting islands of copper and using those as solder-able insulated terminals.
The usual tool is something like a tiny hole saw, complete with pilot or centered drill bit.

It makes tiny donut-shaped islands in the copper.

 

[oogenshire]

spot weld cutter?

 

[mcostello]

Broken center drill remover. Have one like it, not that I have ever broken one..................

 

[RaisedByWolves]

Broken center drill remover. Have one like it, not that I have ever broken one..................

Cereal?

Never even heard of this, but it makes sense.