Used with coloured powdered chalk to mark between two points to give a straight line. Twisted nylon line is cheaper than braided. To stop the line fraying at the end hold over a lighted match for a few seconds to melt and weld the ends together. Length: 36 metres Faithfull Twisted Nylon Chalk Lines are ideal for most applications in the building trade and can be used as chalk or brick lines. Faithfull A01 B1054