Double sided tape is a lifesaver when you are making bags. If you haven't used it yet, it will change your life. However, some tape is too thick, or too sticky, or not sticky enough. This clear permanent tape is the perfect width to stay out of your seam allowances yet still have good enough hold for heavy materials. Bonus, no scissors necessary... just tear with your fingers! NOW with a plastic core instead of the paper core that falls apart when you look at it wrong.
PLUS, it comes in a non-stick bag so you can keep threads from accumulating on the sides.