Jump Rope For Double Unders - Adjustable Length With Ball Bearing Handles + Comes with a Carrying Bag + Spare Screw Kit + FMS International Only Authorized Seller Professional Top-speed Jump Rope:Built-in high-end metal bearings in both handles spin quickly and smoothly, which do not intertwine or knot and always swing steadily during movement. Freely Adjustable Rope Length:Oversized screws equipped allow the jump rope to be quickly and conveniently adjusted to the desired length according to your height, so the jump rope is suitable for men, women and children. Comfortable Grip:Ergonomically designed plastic handles are comfortable to grip and anti-slip, thus reducing hand fatigue during exercise and making the jump rope practical and more secure. Outstanding Durability:The jump rope is made of high strength wire rope wrapped by TPU coating, so it is pliable, tough, wear-resistant and anti-aging with small resistance and long service life. Lifetime Guarantee:If you have any questions or you are 100% satisfied with the jump rope you bought, we will provide you with returning and exchange services.