Constructed of high-strength ABS material, durable enough to stand up to everyday use. Compact design fits easily on most housekeeping and cleaning carts. Built-in compartments house up to three different tool attachments: Top Shelf: Quick Change Microfiber Frame, Middle Shelf: Quick Change Duster Frame, Bottom Shelf: Quick Change Squeegee, Brush or 3-in-1 Tool. Easily installed to compatible carts with enclosed hardware (instructions included).