Ultra Wide Ab RollerThe Ab roller wide: 3.54 inches. It is composed of 5 layers of materials, with built-in spring resistance and ergonomic handle. When the ab wheel is pushed forward, the internal spring will be tightened. When people push to the parallel state, the spring has reached the tension state, and it will automatically brake and stop pushing forward, in order to avoid injury caused by pushing too much forward, it help to maximize the effect of core training. Non-Slip And DurableThe ab roller used for abs training is made of high-strength steel core, which can support 440 pounds. EVA rubber cotton stainless steel handle with finger groove is non slip and comfortable, providing safety protection and excellent comfort during sports. Whole Body Muscle TrainingAb roller for core workout will help you, your family and your friend strengthen core strength, burn calories, build bigger and stronger muscles all over the body, and improve overall endurance. This can be effectively used as a home and gym accessory for beginners and advanced athletes. Easy to Assemble and CarryThe ab roller is partially assembled, so you only need to install the handle to complete the installation! The lightweight and compact size design makes this exercise roller easy to pack and carry, and it is an ideal fitness equipment for families, gyms, offices or travel. Protect Your KneeThis Ab Roller is equipped with thick, supportive knee pads to protect your knee from injuries caused by long training.