Jumbl Ab Wheel Roller - Dual, Double Pro Abdominal Exercise Wheel - Fitness Smooth Workout for Abs Conveniently Sized Workout Wheel Strengthens & Tones Abs, Obliques & Core Quickly Delivers Workout to Entire Body with Numerous Health/Fitness Benefits Dual Wheel Design Offers Increased Stability & Wobble-Free Exercising Suitable for all skill and fitness levels, beginners to advanced, Simple to use Molded of Rugged, High Quality, Sweat Resistant Plastics & Rubber Materials Conveniently Sized Workout Wheel Strengthens &amp; Tones Abs, Obliques &amp; Core Quickly Delivers Workout to Entire Body with Numerous Health/Fitness Benefits Dual Wheel Design Offers Increased Stability &amp; Wobble-Free Exercising Suitable for all skill and fitness levels, beginners to advanced, Simple to use Molded of Rugged, High Quality, Sweat Resistant Plastics &amp; Rubber Materials