Features 1. Automatic Abdominal Wheel: As one of the essential gym accessories to fine tune your six pack, this roller is a great tool to work on attractive, defined lines with precisions, more challenge and depth, thanks to its slightly rounded wheel and therefore smaller surface area. 2. Double Round Design: Two wheel built-in spring and greater resistance can prevent the wheel from slipping during smooth exercise.automatic function can protect you from injury during exercise, especially suitable for beginner. 3. Excellent Workmanship: Ab workout dequipment esigned with roller that imitates the tire texture. Multi-layer composite material ensures excellent anti-skid and wear-resisting performances without scratching floor, the bearing roller is not only flexible but also more quiet. With a triangle structure for stability and non-slips handles to provide comfort. 4. Removable Handle: The handle is easy to remove or install, making it more convenient to carry. You can use at home or take with you to the gym or to exercise anywhere. 5. Strength & Abdominal Exercise: Ab roller wheel helps build your muscle and sculpt abdomen, waist, back, shoulder, arm and core effectively. Perfect for home, the gym, or the ice! You can work out any time and anywhere, make your fitness more efficient. Specification Material: ABS, PVC, PU Color: Blue, Red, Gray, Blue & Black, Red & Black Size: 35 × 12 × 15 cm Weight: 1220 g Package Include: 1x Roller Wheel