Feature : Double wheels coaster offer stability while rolling in any direction for targeted work on obliquesDevelops dynamic core strength - Ability to tone the muscles of the entireMore workout in less time - Get More Abdominal Exercises in Less Time by Moving the Stopper Away from Your BodyNo Time for Gym, Traveling... Never Miss Your Exercises - Light Weight and Portable Ab Exerciser to tone your upper body (Chest, Shoulders, Arms, Abdominal, Core and Obliques)Comfort foam mat grip gives you excellent stability for a great abdominal fitness workout for Men & Women,Adjustable height and length band provides you with the best ultimate resistanceProduct description : Product Name: Multi-function puller two-wheeled belly wheelDiameter: 12cmMaterial: pressure resistant PP / ABS engineering plasticsNet weight: about 0.1kgPackage included :1 * Double Wheel AB Roller