Making a Holder for a Chuck Key

I wanted to keep the key handy with my hammer drill, after the rubber holder tore. I used a USB cord that I found because it will be stronger than string. I washed the cord with hand cleaner first, and used shrink tubing instead of tape because tape might eventually unravel. I think this succeeded. It only took a few minutes to do this. And, yes, as I recorded this video I referred to the chuck key as the "chuck". Oops, I misspoke. I think you will know what I mean.