1. Aluminum Alloy & Light-weighted Handle, Anti Skipping ,easy for children to carry: The metal-textured handles provide comfortable grip. Light-weighted design makes it easier to hold even during high intensity workout. 2. 360Swivel Ball Bearing Hits Double Unders: 360 degree swivel ball bearing double rotation mechanism increases its rotation power and gives you an extreme flexibility of movement. 3. Light, Durable & Adjustable steel coated Rope will be not twisted: The rope is made of coated steel wire which is extremely durable and save your skin from lots of pain. Light-weighted design is perfect for skipping with high intensity workouts.Adjust the screw in both sides, loosen it and make this rope length as you need and then tighten this screw again,appropriate for all ages 4.What is included in the package: 360Swivel Ball Bearing Jump Rope + Spare Screw Kit + Free Carry Bag, very easy to carry for vocation. 5. The jump rope is perfect for Home Gym and Outdoor Workouts, solving the rope winding of traditional rope. Professional for MMA Training, Mastering Double Under Bodybuilding, Boxing, Cardio Exercises, Personal Training Equipment.