Which tool is primarily used to mark specific locations during installations?

The scratch awl is primarily used in installations to mark specific locations, particularly on surfaces such as walls or floors. This tool has a sharp point, making it ideal for creating precise indentations or markings that can guide where to drill or place hardware. Using a scratch awl helps ensure accuracy in measurements and placements, which is critical in installations to ensure that components fit correctly and function as intended.

In contrast, the punch down tool is designed for terminating wires onto a punch down block, the torque wrench is used for applying a specific amount of torque to fasteners, and the tone and probe kit is utilized for identifying and tracing cables. While these tools are essential in their respective contexts, they do not serve the primary function of marking locations during the installation process.