Rain Bird HPUN1-1S Drip Irrigation Hole Punch Tool,Black

The description says this is for punching holes in 1/2" tubing, but the tubing in the container kit is 1/4". Will this work to add fittings?

Will this tool also serve as a hole punch for the insertion tool? Or will I need to purchase one seperately?

what size is the hole?

Can I use this for the flag type emitters, or only the button emitter?