ab roller has a revolutionary automatic rebound design with intelligent auxiliary brakes and a built-in brake system for smoother and more controlled steel rebound. 2-in-1 Abdominal Exercise Machine has a scientifically designed ab roller with 5 anti-slip layers for noise reduction, shock absorption, and wear resistance. ab roller has a double widen wheels design that increases the wheelbase and contact area with the ground, reducing lateral sway and providing stable and safe workouts. Upgraded ab roller with elbow support for enhanced stability during workouts, precise ab muscle activation, and reduced arm fatigue or injury risks. Multi-layer wheels and handle on our ab roller provide comfort, grip, and protection. The high-quality materials include anti-slip, reinforcement, damping, mute, and noise reduction layers. Detachable handle with thick foam for easy storage and sweat absorption. Thickened foam cushion design protects the elbow during workouts. Shape and tone your entire body with our ab wheel. Burn fat faster, shape 6-pack abs, and achieve your fitness goals. Perfect for beginners and fitness enthusiasts. Start your journey today!