When you're working away at the sewing machine, you would know the pain of needing to undo stitches.
When this happens you no doubt reach for your trusty seam ripper or unpicker to help out.
You also may have noticed the small ball that is on the end of one of the prongs, but never really known what it's there for.
The ball on the end of the unpicker is to allow the tool to be slid along the garment in one swipe, so you don't need to fuss about individual stitches.
We've included a video below to show you exactly how it works.