What is the purpose of leveling screws on a builder's level?

The purpose of leveling screws on a builder's level is to help achieve a balanced position. These screws are critical for adjusting the instrument in order to ensure that it is perfectly horizontal. When setting up a builder's level, it's important that the instrument is level so that any measurements taken will be accurate. By adjusting the leveling screws, the user can tilt and manipulate the level until the bubble in the level vial is centered, indicating that the tool is level. This adjustment is essential for maintaining accuracy in surveying, grading, and other applications where precise horizontal measurements are required.