In article , Eastburn
wrote:

My bet the chassis Punches are knockout punches for Conduit and pipe.

IIRC, the size is the pipe size - the I.D. So if you buy some, check
it
with a ruler. The quality is still tough steel - Greenlee very likely.

I bought a set once - and had to unload it - many years ago now.

Martin

He has both the Conduit sizes (up to 8 inch) and 730 series dimensional
sizes, round and square and lots of single and double D sizes as well.

As I said piles of stuff.
Currently there is just no way to put it all in a showroom.
The showroom would have to be the size of a football field.