The Teflon foot is made of non-stick material and allows smooth movement even when sewing problematic materials such as leatherette, plastic, vinyl, leather, etc.
The top feed foot helps feed the top layer of fabric smoothly. It is very useful for quilting straight lines and sewing materials that tend to stick to the foot.
The vertical spring holds the fabric down as the needle moves up and prevents the fabric from lifting with the needle when free-stitching with the feed dogs down and when...