The builder's level is specifically designed for establishing horizontal and vertical lines for construction and leveling tasks. It uses a telescope to sight a known point, and then enables the user to establish level points over a distance by adjusting the instrument until the bubble level indicates that it is perfectly level. This makes it invaluable for checking elevations across large areas, such as when setting footings, floors, or grading land.
While the chalk line is useful for marking straight lines over long distances, it does not provide precision in level measurements. The laser level is also an effective tool for establishing level points, particularly in larger or more complex projects, but the builder's level is more traditional and is often favored in certain conditions or by those who prefer analog tools. The framing square, while essential for measuring and laying out square corners, does not provide any leveling capability, which further distinguishes the builder's level as the correct choice for this particular task.