Box handle

How to handle/carry a big and havy cardboard box, that´s not equiped with it´s own handles?
Maybe you will like this answer to that question.
The box handle part is able to bite itself into a cardboard box and so offers ergonomic handles for carrying.
- open the box handle
- pierce box handle with it´s top teeth through top of cardboard box
- shut box handle by turning the handle element and by that way pierce with it´s side teeth the side wall of the box
- lift box
- remove