It’s a one-handed horizontal jumper! Learn to make smooth circular motions with the hand and wrist that transfers to a ball-on-cord that rotates around the feet at a constant speed. The goal is to jump over it on each pass without striking it. Jump by yourself or cooperative jump with one or two others positioned just next to the twirler. Great for those with an arm or hand disability, or when low ceilings inhibit standard rope jumping. Sold in a set of 6 COLORZ.