I dunno it's just on google, there's no info on how it was done, and I can't be sure that they didn't just tie it on one of the outside parts that's not shown, but I doubt it for the price they charge for these things. I've been making a lot of nunchaku (maybe 20 or so, I just kinda make new ones and throw out old ones) trying to improve, and I felt like I wanted to make a super nice pair to keep in my new car, and I felt that braiding the chucks would be a nice skill to learn and make them look a lot nicer.