this tool has my attention =)
Doesn't appear sharp at all and looks to be much quicker in threading through shared holes compared to tooth floss.
A quick google image search got me the source site for the first picture (in link there are 17 pictures with variations of the item and of the wire shape alone for any DIY'ers:
Việc xỏ dây cước cầu lông ngang qua điểm giao dây dọc trong cách đan sau thật khó khăn, nhưng từ nay bạn hãy dùng dụng cụ hỗ trợ kéo dây này sẽ nhanh trong tích tắc
trangnguyen.vn
Appears to be a tool used in jewelry or sewing. *Update*: "Needle Threader" (for tufting guns, beading and hair extenstions!)
Can find them in multipacks at Aliexpress for $2-5.
images that caught my attention:
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