BERNINA Zipper foot with non-stick sole #54 sews zippers to 'sticky' fabrics, producing exactly parallel seams as it does so, thanks to guide. Accurately sewing in zippers of all sizes; the zipper will be sewn in straight and the edges topstitched precisely; Non-stick coating on the sole ensures it slides smoothly; for plastic, vinyl, leather, etc. For 5.5 mm and 9 mm machines.