# Construct Circular Fillet

Used to construct a circular fillet (arc) between two elements (lines, line strings, circular arcs, circles, or shapes), two segments of a line string, or two sides of a shape.

When you construct a circular fillet between two segments of a line string, the line string is broken into two independent line strings and arc. When you construct a circular fillet between two sides of a shape, the shape is broken into a line string and an arc.

You can access this tool from the following:

To construct a 3D fillet between two surfaces, use the Fillet Surface along Curves tool.

To construct a 3D fillet along an edge of a solid, use the Fillet Edges tool.