The faithfull chalk line offers quick and effective line marking when building or decorating the die cast magnesium body contains a 30m line reel which passes through a reservoir of coloured chalk not supplied it becomes coated as it is reeled out snapping the taut line against a surface deposits the colour chalk leaving a visible but temporary line to work to a useful feature of this reel is the push button instant release which allows the line to be pulled out rapidly whilst bypassing the wind