Crossover Performance Ultra Speed Jump Rope - Premium Dual Ball Bearing Design - Smoothest Swinging Speed Rope for Crossfit Rx Double Unders - Boxing - MMA - Cardio Workouts. Bonus eBook Included. DOUBLE BALL BEARING DESIGN - Provides incredibly smooth rotation that leads to swings up to 3x faster than a conventional jump rope with far fewer mistakes. LONG TAPERED HANDLES - Provide a comfortable grip and centrifugal advantage for quicker handle rotation and control. 2.5mm PVC COATED CABLE - Extremely light weight, tangle-free, and incredibly durable. High quality thumb screws easily and quickly adjust the 10ft cable to fit any size adult or child. BONUSES INCLUDED: Nylon Carry Bag, Extra Cable and Hardware, and Jump Rope Workout eBook! PREMIUM QUALITY MATERIALS AND CUSTOMER SERVICE. 100% SATISFACTION GUARANTEE. Order your Ultra Speed Jump Rope TODAY and take your fitness to a higher level!