General description 100 Pieces Hollow Brick Anchor set includes both butterfly and airplane-shaped anchors, designed for use with plasterboard, gypsum fiber board, concrete, bricks, and cavity walls. This versatile set is ideal for securely installing various items such as TV brackets, cabinets, shelves, lamps, and curtains. Technical specifications Material: High-quality metal and plastic Quantity: 50 butterfly expansion anchors, 50 airplane expansion anchors, 100 screws Installation Drill a hole in the wall with the same depth and diameter as the expansion anchor. Insert the expansion anchor into the wall. Turn the screw clockwise until it aligns with the expansion anchor. Usage Suitable for installing or hanging various objects including benzene boards, decorative boards, asbestos boards, hollow boards, and solid boards.