CROSSFIT Speed Jump Rope - Fastest Double Unders, High Quality Speed Cable Rope with Metal Ball Bearings, Adjustable Length - Best for Fitness Training, MMA, Boxing, Exercise and Weight Loss Unique Metal Ball Bearings provide effortless rotations of the rope for the fastest Double Unders Braided cable creates less wind resistance and increased stability Light weight handles 10' Adjustable length rope FREE CARRYING CASE!