What does the "Plumb" tool measure?

The "Plumb" tool is specifically designed to measure vertical alignment or depth in construction and carpentry. It utilizes the force of gravity to ensure that a structure is perfectly vertical, making it essential for tasks where correct alignment is critical. When a plumb line is suspended from a fixed point, it will point directly downward due to gravity, allowing builders to measure and establish a straight vertical reference. This function is crucial for ensuring that walls and other structures are constructed accurately and to avoid tilting or leaning.

In the context of the other options, height refers to the vertical measurement of an object from its base to its top, width pertains to the horizontal measurement, and angle is related to the degree of connection between two lines or surfaces. While these measurements are important, the specific function of the plumb tool is to confirm depth or verticality, distinguishing its operation from those other measurements.