The Buddy Lee Hyperformance Aero Speed Rope was voted "the smoothest, fastest, and best-balanced rope, period" by Men's Health and was also featured in Men's Fitness and Men's Muscle. It is a Hyperformance Rope" designed for the serious adult or youth athlete/ fitness buff. It is made for ultra speed (5-6 turns per second) and power jump rope training. The Aero Speed has 6'' handles made of T-Grade Aluminum for superior quality, durability and look. It is designed with Buddy Lee's swivel bearing system that is technically engineered for eliminating friction, drag, tangling and allows smooth turning action in all directions. This advanced swivel bearing system provides you with high intensity jump rope training and makes jumping easy, effortless and fun. The Aero Speed innovative adjustment system also allows you to custom size the rope for your height in seconds. The swivel-bearing wrench is specifically designed to secure and replace the bearings to maintain years of Hyperformance jumping. The rope cord and swivel bearings are replaceable. Adjustable for people 6' 5" and under.