In article ,
David wrote:
I have also looked at hole punches.
Apparently you drill a pilot hole, insert a bolt, then tighten the cutter
down.
Again not finding 30 mm size.
[At least, not with fast delivery.]

A hole punch, common name Q-Max, gives a near perfect hole, but costs a
lot more than a hole saw. Ebay price about 15 quid.

Any decent supplier should have a 30mm one.

--
*I'm already visualizing the duct tape over your mouth

Dave Plowman London SW
To e-mail, change noise into sound.