Qfitter Pro, Made by a Fitness Club [Product Description] By using it while lying on your back, the two rows of balls along your spine press on the muscles of your back, relieving muscle stiffness. Furthermore, the balls fit into the gaps between your shoulder blades, allowing you to stretch while pushing your shoulder blades apart. It can also be connected vertically and horizontally, and can be bent, rolled up, wrapped, and flexibly shaped, allowing for various stretches and exercises. It can be used on the floor or on a chair, making it a convenient option for multitasking. Thank you for viewing. Please check the web page for detailed specifications. The accessories are all shown in the photos. Overall, it has been used sparingly and is in good condition. The period of use is unknown. Please check the photos for scratches and condition. Thank you. Please refrain from purchasing if you are looking for a perfect item, as this is a used item. The degree of scratches is based on my personal judgment, so please understand and agree to this before considering a purchase.