KYLIN SPORT 3M/9.8FT Professional Aluminum Handle Adjustable Speed Jump Rope Cable with Bearing for Double Unders Crossfit Workout Gym Ideal rope for double-unders and speed jumping. Smooth and quick with every rotation Perfect for anyone from Professional Boxers to Cross Trainers to Beginners who want to get in shape and master Double Unders, Triple Unders and even Quadruple Unders! Our jump rope comes with a fully adjustable 10 foot long cable. Fitted with extra-large screws it's very easy to adjust, making it suitable for both ADULTS and KIDS The bearing can improve the rotate speed of the wire rope , extend working life material: 3M(9.84ft)steel wire+ Aluminum handles+bearings