Is this a valve guide hone?

[alexiskai]

What is this tool and how would I (or even should I) use it?

 

[Hitman]

It’s a hone, you’ll need to collapse the stones a little and measure the diameter to determine its application. It looks too big for an A guide hone. I’d guess it’s a brake or master cylinder hone.

It’s chucked in a drill and used with oil to hone whatever it ultimately fits.

 

[alexiskai]

Roughly an inch, so yeah, way too big. OK thanks.

 

[Bob C]

Looks like a brake cylinder hone.

 

[Big hammer]

Gooder ones have 3 stones !

 

[Bob C]

But the gooder ones wouldn't work on my 1967 VW, to big.

 

[su8pack1]

Drum brake cylinder hone.

 

[Bob Bidonde]

It's a brake cylinder hone.