Back at home today...I have a full set of swagers, these are what you need, you drill or punch the hole first then swage the hole with the appropriate sized swager, my set goes from 1/2" to 2.5" step by step pics below....2" hole....





Hole cut with a normal hole saw..



Swaged





Another shot of the tool..



I cant remember where these came from, it says 'MB' on the tools themselves...

HTH

Ian