The Buddy Lee Hyperformance Aero Speed" is aesthetically the Rolls Royce of Jump Ropes and represents the latest in innovation of all jump ropes. It 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. No matter what fitness level you are at, it will make you feel like a pro and make you want to jump! 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. Please see complete sizing, adjustment and rope care instructions inside the rope card.