metal pole with a pointed tip attached to the roof of a building connected to a metal wire or cable a grounding system at the base a finial or decorative ornament at the top
lightningrod which has metal pole with a pointed tip lightningrod which is attached to the roof of a building lightningrod which has connected to a metal wire or cable lightningrod which is a grounding system at the base lightningrod which is a finial or decorative ornament at the top