What is this

[Theclockworks]

Had this kicking around in my toolbox for years,I believe it comes from the Raleigh works in Nottingham any ideas guy?

 

[Theclockworks]

Another image

 

[Toolguy]

To me it looks like the cartridge for a boring head that's set up to use carbide inserts.

 

[TorontoBuilder]

To me it looks like the cartridge for a boring head that's set up to use carbide inserts.

i concur..........

 

[purpleknif]

That's exactly what it is . Use them all the time at work.