The Bernina Roller Foot # 51 Roller foot 51 is expert at sewing on difficult materials. The three rollers on its sole enable it to glide effortlessly over “sticky” textiles such as leather and vinyl, as well as fabrics with a rough surface texture. A must have for leather fans! Fabric feed proceeds without a hitch, producing a neat, even stitch pattern. This makes Roller foot # 51 ideal for the decorative topstitching of leather, as well as the construction and repair of bags, raincoats and other garments or home furnishings