Which line is used on a detail drawing to tie specific notes to a feature?

In detail drawings, leader lines are specifically used to connect notes or labels to certain features or components of the drawing. They provide a clear visual link that indicates which particular element the note pertains to, ensuring that the information is easily understood and associated with the correct feature. Leaders typically point to the item being referenced, often including text that describes specifications, materials, or other relevant notes necessary for construction or manufacturing.

The other line types serve different purposes: center lines denote axes of symmetry or rotation, dimension lines indicate the measurements of objects, and extension lines show the extent of a dimension. While those lines are important in their own rights, they do not provide the direct association between notes and features that leader lines accomplish.