For use with powdered chalk for marking between two points to give a straight line. Braided line resists fraying and is also useful for a plumb line as it does not spin round as a conventional twisted cord. Braided nylon has less stretch than other lines and is also the strongest. 100 metre spool. Description: Braided Nylon Chalk Line Colour: White Length: 100M Breaking Strength: 28.8kg