Toggle anchor (airplane clip / butterfly anchor) is a spring-loaded cavity wall fastener. It consists of spring metal wings and a machine screw. After inserting into the drilled hole of hollow substrate, the spring wings open automatically behind the board to form a large bearing area. It provides strong pull-out resistance. Widely used for plasterboard, hollow brick, gypsum board, hollow precast slab. Material: carbon steel, surface galvanized. Suitable for mounting lamps, cabinets, sanitary ware and decorations on hollow walls.