Hammer drive ceiling anchor (nail drive expansion anchor) consists of slotted expansion sleeve and driving pin. After pre-drilling hole in concrete or brick, insert anchor and hammer the pin to expand the sleeve and lock firmly. Made of carbon steel with zinc plated finish for anti-corrosion. Fast installation without spanner. Widely used for suspended ceiling, light steel keel, cable tray and fixture fixing on concrete wall & ceiling. Sizes M6, M8, length 35–70mm.