Foot #L23, Curve FootBERNINA L850 L860 Overlocker Easily sew small rounded shapes and curves The narrow and short design of the transparent foot allows maneuverable sewing of small rounded shapes and curves. In order to enable precise work, the knife can be deactivated for small curves and for the 3 thread overlock stitch narrow (RN). You will achieve perfect small curves with narrow stitches and a short stitch length.