Is this a valve guide hone?
 

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

Re: Is this a valve guide hone?
 

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.

Re: Is this a valve guide hone?
 

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

Re: Is this a valve guide hone?
 

Looks like a brake cylinder hone.

Re: Is this a valve guide hone?
 

Gooder ones have 3 stones !

Re: Is this a valve guide hone?
 

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

Re: Is this a valve guide hone?
 

Drum brake cylinder hone.

Re: Is this a valve guide hone?
 

It's a brake cylinder hone.