It's a time-saver, no need to get the scissors out each time you need a piece of wrapping paper
plus, it's a good way to reuse & recycle
The large Freezer Paper Boxes work best...make sure it has the metal cutting edge
Cut your roll of wrapping paper to the correct length, I used a razor knife..
I think a band saw or jigsaw would be easier.
Could also be done with a serrated kitchen knife...just saw through it
Put your wrapping paper roll into the empty box and viola...
a Handy Wrapping Paper Cutter
Also a great way to organize your papers, just tape a piece of the wrapping paper to the end of box and at a glance you'll know which paper is inside.