RAGE Fitness R1 Speed Rope Designed by a Jump Rope World Champion, Ideal for CrossFit, Boxing and Fitness Training, Adjustable 11&rsquo; Cable World's fastest speed jump rope Ergonomic handle design and coated speed rope reduces friction and increases speed 11' speed cable adjusts to fit multiple heights Lightweight durable nylon handle for longer, faster workouts Enhances speed jumping, double under and triple under. Ideal for boxing, cross fit, and cardio training