This book carts with wheels provides 8-tier large storage space while saving you floor space to optimize space utilization. (Including total 6 tier of the 2 sides bookshelves)Deep and Large Bottom with fences are designed for preventing items from dropping.The rolling bookshelf comes with detailed step-by-step installation instructions, necessary tools, and parts. All components are labelled with numbers to make assembly a breeze. Once assembled, the file cart will be sturdy and reliable, providing convenience and peace of mind for your use.This Movable Multi-Tier rolling bookshelf cart with wheels comes equipped with 4 wheels (2 lockable) design makes it easy & convenient to roll around to anywhere you need, or lock it in any place.