KW-triO Handheld DIY Mushroom 12 Holes Punch Puncher Paper Cutter with Ruler 6 Sheets Punch Capacity A4 / A5 / A7 / B5 for Office Home School Students Supplies ( Item#: OS6398C )

The adjustable 4-hole allows resetting of all 4 hole punches for use with A5 jams in A5 paper.

I struggled to find a hole punch for the A4 flipchart I bought (it's really cool). It works great. And it's adjustable.

Before I bought the hole punch, I had to push the paper through the clips to make them fit. It was messy and the paper got torn easily. Now, with my handy hole punch, organizing the paper in the binder has become a breeze.