Our smart ab roller exercise machine is equipped with a smart brake design and a strong automatic rebound function, which can prevent accidental falls and injuries when pushing forward. The entire ab wheel equipment is covered with rubber to imitate the tread of a car tire, providing a strong grip and resisting slippage. Type of AB Roller Wheel from YANXING FIT SW1 Smart AB Wheel Our smart abdominal wheel is ergonomically designed with ABS curved handle, which is comfortable to grip and not easy to slip off. With the built-in thickened steel pipe, it is stable and strong. It adopts black and multi-color contrast color appearance design, which enriches the visual layering and adds color to sports.