Teflon Bottom Straight Stitch Presser Foot For Singer Featherweight Sewing Machines. Non-Stick Feet are great for working with leather, laminated foam, rubber, and plastic fabrics. This foot is designed to eliminate drag and pucker while not damaging fabric. The small needle hole of this foot prevents the light weight fabric from "buckling" and causing puckering or skipped stitches. Fits Singer models : 15-91, 185, 201, 221 Featherweight, 222, 222K