Standard size flat type, compact structure, compatible with all mainstream of plasterboard flat box handles. Easy operation with a fixed hinge for quick opening and cleaning, along with a back for better hand manipulation. Constructed with hard coated anodized aluminum casing, making it , and wear for a long service life. Wallboard finishing box designed for perfect finishing of butt and flat joint edges, whether applying a first coat or a final finish. Easy to open by turning the screw counterclockwise, facilitating installation and removal, ideal for home wall painting and finishing.