The Roller Foot can be used to sew thicker fabrics, napped fabrics, heavy knits, leather, vinyl, or any heavier weight fabrics that are difficult to feed. The foot has two sets of rollers, one large which is to the front and two small rollers at the back of the foot. This allows the fabric to pass under the foot smoothly.Depending on your machine model, the foot may have its own shank or it may simply snap on and off
9th Jun 2016