This is most fascinating. It appears to be a 'repair kit,' if the title on the box is to be trusted...

[There's a moment of confusion as he realizes he's managed to knot the thread around his fingers, looking almost like a game of cat's cradle gone awry. A grumble as he tugs, snapping the string.]

I am not sure what sort of repairs they would manage with these materials. They are hardly durable.