Make sure this fitsby entering your model number. ☸ Unique Functions.Our ab carver wheel uses a spiral alloy spring steel with High & Even elasticity, self-rebound and smart brake.It provides smooth resistance when rolling forward, and provides rebounding power backwards. It is easier and less laborious than ordinary abdominal wheels. Even beginners who are not strong enough can easily use them. ☸ Special Design.The ultra-wide, spherical wheel allows users to carve left or right to engage all sets of abdominals, including oblique muscles. The increased wheel width offers stability and balance.These non-slip handles are removable for easy transport and storage.