The Pattern Punch is used to punch holes in your cardboard blocks/patterns so that you can store them hanging up.
The Pattern Punch is used with Pattern Hooks
This Pattern Punch makes a 1.25 cm diameter (3/4") hole - through which you put a Pattern Hook.
Buying Pattern Punches in Australia
One stockist in Australia is EM Greenfields, Sydney. (I do not receive affiliate or any other payment from EM Greenfields).