Convenient training, easy to take anywhere - Exercises with ab rollers do not require hours of learning. This castor is light, compact and easy to carry Two parallel and silent wheels The distance between the two wheels is 3 cm: the force can be distributed evenly. When training, the wheels do not tilt to the side. They don't make noise: Your motivation for working out won't be affected by unpleasant noise Comfortable knee pad A high-quality foam pad will protect your knees. It can also be used as a sitting mat Non-slip handles The thick foam handles can absorb sweat: this allows you to extend the duration of your workout No Workout Required, No Floor Scratches - You can exercise anywhere without the risk of floor scratches, e.g., home, office, gym, etc