The genuine Fischer RG 12x90 M8 I internal thread anchor (Part Number 050552) is a system component designed for secure fastening with Fischer injection mortars in non-cracked concrete. This galvanized steel internally threaded sleeve allows for flush pre-installation, enabling attachments like pipelines, ventilation systems, and cable trays to be repeatedly dismantled and re-fastened, providing maximum flexibility for indoor applications. It features an M8 internal thread and requires a 12mm drill bit with a minimum 90mm drill hole and anchorage depth. The anchor sleeve itself is 90mm long and uses a 10mm wrench size. Supplied in a convenient pack of 10 pieces.