A reel-type container that holds chalk and a line, used to lay out lines on surfaces, is known as what?

A reel-type container that holds chalk and a line is known as a chalk line. This tool is primarily used in masonry and construction to create straight lines over long distances, which helps workers mark exact locations for cuts, placement of materials, or alignment. The chalk inside the container is released onto the string, and when the line is pulled taut and snapped, it creates a visible guideline on the surface, allowing for precise work. The mechanism and design of a chalk line make it efficient for laying out projects quickly and accurately, which is essential in masonry tasks where alignment and measurement are critical for structural integrity and aesthetics.