Ultra Light Speed Jump Rope for Double Unders - Versatile Cable Speed Ropew/Free eBook : : Fully Adjustable Length GUARANTEED SPEED: Quick ultra-light weight 1oz bushing handles spin 6-7 jumps a second IMPROVE DOUBLE UNDERS: Designed by a champion speed jumper to improve your double under skill INCREDIBLY VERSATILE: Quickly adjust length & replace worn cable via innovative screw/collar system HIGHEST QUALITY nylon-coated USA made speed cable - 1 year warranty on ultra-light handles CROSSFIT APPROVED: Entry-level fitness jump rope popular among athletes looking to get in to Crossfit and HIIT