Construction Lines brings precise CAD-style modeling workflows to Blender. The add-on provides tools to build snappable guide points and edges, measure distances, and draw exact lines, rectangles, circles, and arcs directly onto existing meshes or guides. It supports numeric input for exact measurements and utilizes automatic face creation when drawing closed geometry.

The toolset operates fluidly between Object and Edit modes without relying on the 3D cursor for location placement. Additional features include precise object movement, grid snapping, duplication arrays, axis restriction constraints, and the ability to cut into existing faces and extrude through meshes.