Tis' a puzzlement

[Hdskip]

I recently acquired some reloading equipment and these 3 items were in one of the boxes. I do not have the first clue as to what they are. they are anodized aluminum and are all different sizes on the one end. Each is solid and in addition appear to be unused. my question is this : Can anyone identify these items? Thank you in advance.


306057306058

[M-Tecs]

Briley choke tube set drivers

https://brileyfirearms.com/c-467-side-kick-chamber-tube-sets.aspx

https://www.trapshooters.com/threads/briley-tube-set-drivers.260284/

[Hdskip]

Thanks. I even have Briley tubes and have never seen them before.