Ultra-Wide 2.2 Meters Distance: The ultra-wide distance of 2.2 meters allows you to modify different angles and strengths during exercise to target various muscle groups.Built-In High-Strength Spring: This abs wheel has a limit brake that reduces the speed at the vertex, which prevents injuries and accidents. It also has a built-in high-strength spring that activates the rebound assist when the force is pushed to the top.Balance and Control: Our abs wheel features a 23mm wider and 123mm widened wheel hub that enhances your stability and safety during your core exercises. You can roll with confidence and avoid injuries with this sturdy and smooth wheel.ilt-In Timing Chip: This abs wheel has a chip that intelligently and accurately times your workout. You don't need to manually keep track of your progress.Shape your abs and core strength: This abs wheel can help you shape your abs and core strength by rolling it on the ground and working on your muscles in your shoulders, waist, back, and arms. It is a simple and powerful device that can help you achieve a perfect figure.Specification:Item Type: Ab Roller For Abs WorkoutMaterial: EVA+ABS+rubber+spring+steel pipesFeatures: Limit brake, reboundWeight: 1.8kgPackage List:1 x Ab RollerNote:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.