But they aren't magnets - what you're seeing is just a boring old chain of metal beads, the kind that you might have at home hanging from blinds or from ceiling fans. (You can buy it here.) ...

So Goodridge and another engineer, William Gagnon, invented a process called swaging, which produces metal bead chains without leaving any scraps, using all the metal that goes into the machine.

Ball Chain Manufacturing Co., Inc. (Ball Chain) is the only major U.S. manufacturer of metal ball chain and attachments. The company's ball chain is featured in window roller shades, light ...

The thing you pull on to open and close them. Searching for metal 4.5mm bead chain on ebay gets you the right sort of thing. That also bring up the linkages you'll need to buy to make the chain ...