To create a sweep feature the Sweep Path gets created first, then and a single closed sketch Profile. The Profile will be related to the Sweep Path with a PIERCE or a coincident relation. When the Profile is swept, the Sweep Path and Guide Curves help control the shape and its behaviors such as twisting, tangencies, etc. The Composite Curve I ~I option allows multiple sketches or model edges to be jointed into one continuous path for use in sweep features. (The sketches must be connecting with one another in order for the composite curve to work. This lesson will guide you through the creation of a helical extension spring; where several 2D sketches will be combined with a 3D helix to create one continuous curve. This curve is called: Composite Curve.