6 adjustable reading positions: The back of the book rack has 6 notches. You can easily adjust the height and angle to suit your needs, allowing you to enjoy perfect vision, correct poor reading posture, protect your eyes, and relieve tension in your head and neck. Universal Compatibility: This shelf can perfectly support books, recipes, sheet music, magazines, mobile phones, tablets and other items. The arms can be extended 180 degrees and the longest arm holder can reach 50cm, which is suitable for placing many objects. Smart design: There are 4 anti-slip pads at the bottom of the bookcase stand, which can keep the stand stable and difficult to slide. There are clips at the bottom of the bookcase, which can be adjusted freely to keep your books open, which is convenient for your reading. Top quality materials: The bookcase is made of high quality stainless steel, strong and durable. The surface has been painted and polished to make the surface smooth and prevent corrosion, so your hands won't get scratched during use.