The Harvinger brand is known around the world by developing high quality and meticulously designed training equipment with top athletes. The Ab Carver Pro is a ab roller with a large and stable feel. The patented design of the ab wheel helps to improve the effectiveness of your ab exercises and strengthen muscles in your back, chest, arms and core. Unlike traditional ab wheels, the Ab Carver Pro uses a unique carbon steel spring mechanism to help you tone your muscles more firmly. Helps strengthen deep muscles that stabilize your pelvis and spine. It also features an angled ergonomic hand grip that maximizes muscle interaction in your arm while keeping you comfortable and stable.