Library cart with universal pulley system and strong loadbearing capacity for moving heavy items smoothly. Undertable storage rack with multilayer classification and universal pulleys, delivering reliable loadbearing and organized storage. Multilayer classification design provides clear organization and increased storage capacity. Open design allows easy access to stored items and undertable storage, saving space. 360degree universal wheels with builtin brakes enable smooth movement and secure stopping with a light push. Use scenarios In libraries, schools, or offices to move books, documents, and supplies between areas while keeping items organized. In classrooms, studios, or workshops to shuttle equipment and storage materials, helping maintain a tidy, efficient workspace. In reception areas, break rooms, or clinics to transport magazines, brochures, and small supplies and store them under desks to maximize available space.