Wire rope is several strands of metal wire twisted into a helix forming a composite "rope", in a pattern known as "laid rope". Larger diameter wire rope consists of multiple strands of such laid rope in a pattern known as "cable laid". In stricter senses, the term "wire rope" refers to a diameter larger than 3/8 inch (9.52 mm), with smaller gauges designated cable or cords.Initially wrought iron wires were used, but today steel is the main material used for wire ropes.