【High Safety and Quiet Operation】: With a two-wheel design, it's safer and more stable than single-wheel ab rollers, ensuring safety and stability during exercise. The wheels also operate quietly, maintaining comfort during your workout. 【Excellent Stability】: With elbow supports, even beginners can train stably, preventing falls. The foam is soft, comfortable, sweat-absorbent, and non-slip, providing a very good user experience. 【Automatic Rebound for Easy Start】: The wheel has a spring mechanism to assist with better exercise. Avoid straining your shoulders and risking injury. 【PVC Material】: The PVC material is non-slip and wear-resistant, protecting your floors. The wheels are wrapped in a soft material and can be used on all floors. Even on wooden floors, you can exercise without causing damage. 【Non-Slip Handle Design】: The ab roller handle surface has a non-slip design, preventing your hands from sweating and losing grip during exercise. Avoid injuries. The foam is soft, comfortable, sweat-absorbent, and non-slip. 【Super Easy Installation】: Installation is completed in about 5 minutes. The instruction manual explains the installation method, making it easy even for beginners. 【Reliable Warranty】: This product comes with a 3-month quality guarantee, and we offer a free replacement service if there are any quality issues. We also have high-quality after-sales service; customers can contact us through the contact information in the instruction manual. 【Package Contents】: Main unit *1, Handle *1, Knee mat *1, Pipe *1, EVA pads *2, Elbow supports *2, Timer *1, Japanese instruction manual *1. Note: The knee mat will be sent in either blue or gray at random. The included knee mat is small, so we recommend using your own exercise mat.