Which tool is primarily used for measuring distances on stage?

The measuring tape is the primary tool used for measuring distances on stage because it is specifically designed for accurately gauging lengths and distances. In stagecraft, precise measurements are crucial for set design, positioning of props, and ensuring that all elements fit together correctly. Measuring tapes are flexible, allowing them to be easily maneuvered around obstacles and provide both short and long-range measurements. This versatility makes the measuring tape an essential tool in the theater environment, where spatial awareness and accuracy contribute significantly to the overall production quality. Other tools listed, such as wrenches, multitools, and screwdrivers, serve different purposes related to assembly and fastening components but do not fulfill the specific need for measuring distances.