Features 1. Automatic Rebound Abdominal Wheel: Our ab roller features automatic rebound wheel with the built-in high-elasticity and silent spring design which can power accumulation during forward rolling and rebound to help reset. The automatic rebound function also helps to provide a stable braking system protect you from injuries during exercise. 2. Our upgraded ab roller with elbow support design provide enhanced stability during workouts, reducing lateral movement and preventing arm compensation. This allows for more precise and effective ab muscle activation. With our ab roller, you can focus on training your abs and core muscles without worrying about arm fatigue or injury. 3. Our ab roller features a widened two-wheel design that increase the wheelbase can expand the contact area with the ground, effectively reducing lateral sway that can provides enhanced stability during exercises which is very suitable for beginners. 4. Convenient to carry: Compact, lightweight, and removable handle for easy storage and portability. 5. Our ab roller wheel is a must-have core exercise equipment that helps tone and shape your arms, chest, abs, back, hips, and leg muscles. With the automatic rebound function, this amazing ab roller kit helps men and women burn fat faster. Specification Material: ABS Color: Black, Pink, Orange Size: 36 × 20 × 15 cm Weight: 2000 g Package Include: 1x Abs Wheel Roller 1x Knee Mat 1x Timer 1x Phone Holder