1.Thickened Steel Wireexcellent flexibility, which makes it durable and sturdy to avoid easily cracking or breaking.2.Aluminum HandleThe handles of our skipping jump rope are coated in sturdy aluminum for added firm grip, also ensure our skipping rope stays comfortably in your hands without slipping or sliding.3.Tangle Free WireBuilt-in 360ball bearing to ensure a fast and stable rotation without entanglement, that helps you build up speed and comfort during exercise with more effortless movement.4.Adjustable Length With the simple design for the knot at the end of the wire rope, which allows the length can be adjusted freely to your desired length. Perfect fit making it ideal for both adults and teens.5.Versatile UseOur jump rope is an excellent exercise tool to train your fitness, suitable for both indoor and outdoor sports, also an effective way to burn calorie, lose weight, improve muscle tone, keep fit and and cross-training.