Inside-out countersink bit?

[GrahamRounce]

Chamfer Bit.

I have a few.

View attachment 147739

Which should work just as well for deburring a rod I presume..

 

[Sideways]

If it's non ferrous metal, how about a plumbers deburring or chamfer tool ?

 

[GrahamRounce]

That's great - I'm very tempted! I'd almost never need it, but when I did... And a decent price.
Monument Internal/External Deburrer - up to 38mm - MON365F

 

[clogs]

nice on plastic plumbing tube.....

 

[flying haggis]

https://www.amazon.co.uk/Neikafan-Deburring-Reaming-Aluminum-Deburrer/dp/B09XXFYRY1