A nail is adapted to be inserted in a solid material with a wire hooked to the nail in such a way so that the wire is inserted with the nail into the solid material. The nail is crosswise perforated with grooves on each side of the nail to provide a tight pathway for the wire....http://www.google.ca/patents/US5127785?utm_source=gb-gplus-sharePatent US5127785 - Hanger nail for suspended ceiling
