These metal sliding door accessories ensures effortless movement for bookcase and storage cabinet doors, eliminating friction for a seamless user in homes offices and study rooms Features special rustproof surfaces that withstands humid conditions, maintaining durability in coastal areas and high humidity regions Fits most standard bookcases and storage cabinets with easy installation requiring none additional tools Engineered with reinforced metal construction, each set undergoes rigorous testing to substantial weight without deformation, ideal for bookshelves carrying heavy loads Built in noise reduction systems minimizes operational sound, creating peaceful environments for nurseries, bedrooms, and quiet workspaces, Manufacturer: ZBIianxer