4-Tier Foldable Storage Shelf Collapsible Storage Rack with Lockable Wheels-Black

. 4-tier design keeps a variety of items organized. Foldable metal frame allows for easy assembly. Space-saving storage shelf makes full use of space. Powder-coated metal tubes account for reliable structure. Reinforced back bracket for enhanced support. With anti-toppling device to avoid wobbling and enhance stability. Equipped with 4 smooth rolling casters for easy movement. 2 casters with lockable design keep the storage rack in place. Slot design for easy assembly and saving much effort. Used as a bookshelf, plant stand, or tool storage rack, etc