Twisted nylon chalk lines are ideal for most applications in the building trade and can be used as chalk or brick lines. 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: 18 metres Box of 12 Description: Twisted Nylon Chalk Line Colour: White Length: 18M Breaking Strength: 22kg Qty: 12