Automatic Rebound Abdominal Wheel ---- Our ab roller wheel uses automatic rebound technology to help you smoothly roll and maintain control. Crawler automatic rebound double wheel belly wheel, as one of the essential gym accessories to fine tune your six pack. Safe Exercise ---- Triangle structure, stable safe. and ergonomic, using it helps to exercise muscles and effectively shape your abdominal muscles, back, arms, chest, and shoulder muscles . Premium Material ---- Multi-layer composite material ensures excellent anti-skid and wear-resisting performance without scratching floor, the bearing roller is not only flexible but also more quiet. The sponge handle is non-slip, sweat-absorbent, and comfortable. The rollers are spring-loaded for added safety. Double Round Design ---- The design of 2 rollers can reduce the wheel swing, two wheel built-in spring can prevent the wheel from slipping during smooth exercise. automatic rebound function can protect you from injury during exercise. Convenient to Carry ---- The handle is easy to remove or install, which is compact and easy to carry, perfect for home, gym and office! You can work out any time and anywhere, make your fitness more efficient.