[Automatic rebound design] Our abdominal muscle roller adopts automatic rebound technology, automatic steel spring rebound intelligent auxiliary braking, and a built-in braking system to make the steel spring rebound more smoothly.[Abdominal Exercise Machine/Plate Support Machine Two-in-One] Scientific exertion, automatic rebound, easy to use. Five layers of anti-slip material, anti-noise and wear-resistant: anti-slip layer, reinforcement layer, shock-absorbing layer, noise reduction layer, support layer.Double Wheel DesignThis exercise ab roller has wider front and rear wheels for smooth rolling and better control. It helps you tone every muscle and core area while providing safer control over your body, especially for beginners.Excellent WorkmanshipThis rebound roller is made of stable, environmentally friendly plastic with sponge grip, non-slip, sweat-absorbent, comfortable, fade-resistant, durable, will not make noise or scratch the floor, and provides longer use lifeGrow 6-pack abs faster and saferThe amazing ab roller kit helps men and women burn fat faster and sculpt your 6-pack abs! This roller is designed to sculpt your body!