When dimensioning very small detail, which type of lines are often used?

In technical drawing and dimensioning, leader lines are specifically designed to help identify and connect annotations or notes to the elements they describe, particularly in cases where the detail is very small or intricate. Their angular shape allows them to be placed in a way that avoids cluttering the drawing and ensures that the reader can easily associate the measurement or note with the specific feature being referenced.

This is especially useful in scenarios involving small details, as it can be challenging to position dimension lines without causing confusion. Leader lines effectively guide the viewer's attention to the required measurement without obscuring the drawing itself. By reducing visual clutter and clearly linking dimensions to small features, leader lines enhance clarity and precision in technical documentation.