Ball-bearing swivels improve your hyperloops and orbitals and the general play of your poi. Homeofpoi.com has just announced their Pro Series Chain Cords, and they are officially awesome! Exactly what I've been wanting a shop to come out with. Note that you can buy the swivels alone through homeofpoi.com and feuershow.de, and Pro-Series handles only through HoP. Remember to use "playpoi" as your referral code! :)