OfficeSupplies101 has all of the Drafting Tools and Templates for your creative needs. A French curve is a template made out of plastic composed of many different curves. It is used in manual drafting to draw smooth curves of varying radii. The curve is placed on the drawing material, and a pencil, knife, or other medium is traced around its curves to produce the desired result. French Curve Sets, or French Curves, are sold in a set of several pieces composed of many different curves, giving you a variety of options for a great price.