ever pulled that string on your hoodie or your PJ pants a little too far and now it's out? you can try and rethread it with a safety pin or a straw or just loop or tie it to this tool and thread it right back in under 30 secs.

the pencil portion is 8mm so if you have trouble with your string tunnel not being that big, scale it down by 30 or 40% without having to redesign the whole thing

VERSION2 HAS A POINTED TIP IN CASE YOU NEED THAT TO ADVANCE IT EASIER. may need supports to print the tip depending on your printer