【9mm Thick Rope】This training model uses a 9mm thick PVC rope. It's highly durable and provides sufficient load. The length is adjustable, allowing you to customize the rope size to fit your height and jumping style. 【360° High-Speed & Smooth Rotation】Built-in steel bearings allow for smooth rotation even with a heavy jump rope. You can maintain your tempo without tangling, allowing you to focus on footwork practice and core training. 【Non-Slip Silicone Grip】The grip structure is designed for adult training. The non-slip silicone material provides a stable grip even when you sweat. It reduces hand fatigue even during extended use. 【Detachable 200g Weights for Load Adjustment】You can attach 200g weights inside the handles, enabling high-load training exceeding a total of 850g. The ability to "customize the weight" is a key feature of this adult jump rope, allowing you to adjust it to your goals and physical condition. 【Training Model Used by Active Professional Athletes】Used by active professional kickboxer Katsumi Sasaki in his daily training. This heavy jump rope allows for efficient training of the whole body, core, and lower body with its unique load. Thank you for viewing.