Da Vinci Ultra speed cable jump ropes are super fast and are the best jump rope you can use at home or in the gym for fitness exercises or for competition. These jump ropes have durable light weight handles with a cable rope that provides for super high speed action. Made specifically for speed and double unders. The 10 foot cable rope is easily adjustable to any size. For infoor use only only or on a protective mat. Do not use on abrasive surfaces like asphalt or concrete.