No Noise Abdominal Muscle Exercise Abdomen Exerciser Wheel Ab Rollers. Molded Plastic Discs, steel Rod with Comfortable Grips Strengthens Arm Shoulder and Back, trims and Tones Waistline For Gym Fitness Workout Abdominal Core Strength Training Perfect for Crossfit workouts to help isolate your abdominal muscles Perfect for individuals of any skill and fitness level.