Features: 1.Foldable Design & Space Saving: This student backpack hook features a foldable design that can be easily stored when not in use, making it an ideal space-saving solution for classroom desks and study areas without occupying valuable workspace. 2.Adjustable Width & Secure Mount: Equipped with an adjustable width mechanism, this table edge hook can securely attach to desks ranging from 0.4 to 2.1 inches thick, ensuring a stable hold for school bags and headphones without slipping. 3.Anti-Corrosion & Durable Build: Constructed with anti-corrosion materials, this book bag hanger is built to last in various environments, providing reliable performance for long-term use in both office and classroom settings. 4.Smooth Edge & No Burrs Design: Featuring a smooth and burr-free surface, this desk hook ensures safe handling and prevents any damage to your belongings, making it perfect for hanging headphones and bags without scratches. 5.Retractable & Versatile Function: With its retractable and foldable structure, this hook can be extended for use or tucked away neatly, offering versatile organization options for mounting on desk sides in mobile office or classroom settings. Specifications: Material: Aluminiun Alloy Size: 5*7cm Include: 1 * Hook