Does this "round" screwdriver ("confetti cutter") have a name?

This screwdriver has a rounded tip where others are narrower for the screw slot! It looks like it was made for cutting out confetti! Unlike a "core cutter," the tool I'm looking for doesn't have any serrations on the tip, but is smooth and round. Does anyone know the official name of this part?

Can you easily insert a metal screwdriver blade into an aluminum shaft if you put the screwdriver in the freezer?

I have a small East German screwdriver with an aluminum handle. The blade is made of metal. Since metal shrinks in the cold, would it be possible to easily slide the iron blade into the aluminum handle if I put the screwdriver in the freezer?

What kind of tool is this and what is the name of the manufacturer?

Good morning, I found a tool at the flea market that I can't identify. It's made of metal and rotates. The center is a handle with a gear. If you hold the part in the middle (dark silver) and turn one end (light silver), the other end rotates in the same direction but at a…