High Quality Anti-slip Material: The abdominal wheel is made of durable ABS factory plastic, non-slip rubber and thicken steel pipe. The core wheel is composed of multi-layer materials, including anti-skid layer, reinforced layer, shock-absorbing layer, sound-absorbing layer and support layer. Soft rubber wheel surface provide strong grip and not easy to slip, ensure safety, noise elimination, never damaging carpets and wooden floors. Powerful Automatic Rebound: The ab roller use a spiral alloy spring steel with high and even elasticity, can automatic rebound and smart brake. When the abdomen wheel is pushed to a tight state, the internal carbon steel spring will be locked to the extreme state, then it can brake intelligently and rebound by itself easily and effortlessly. Even women can perform abdominal push independently. Ergonomic Handle Design: The ab wheel have two detachable and easy-grip handles, easy to carry and store. The ergonomically designed grips provide comfort and stability, andprevent slipping during exercise while holding them, helping to reduce pressure on the wrists, arms and shoulders. Multi-angle Side Sliding Exercise: The thickened and widened roller offers stability when you rolling straight, left or right target, avoid excessively large arcs of motion causing muscle strain. This kinetic engine activates your muscles of shoulders, arms and legs, especially abdominal muscles. It contracts your abs through a full range of motion, build muscle and improve your overall endurance. Fully Exercise Muscle Groups: Suitable for beginners and advanced users. It can strengthen abdominal muscle training, latissimus dorsi training, deltoid training, biceps training, pectoralis major training, etc. Exercise the muscles and joints in a balanced manner, reduce weight, and sculpt the abdominal muscles anytime and anywhere.Specifications:Color: Red, purple.Material: ABS factory plastic, thickened steel pipe.Wheel diameter: 17 cm/ 6.7 inches.Wheel width: 13 cm/ 5 inches.Max weight capacity: 300 lbs.Applicable people: Both men and women beginners or professional person, kids.Package includes:1 x Ab roller wheel.2 x Arc skid control handle.Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement.