1.There are 4 settings on the Ruffle Foot: Star, 12, 6, and 1. It represents how many stitches between each pleat or ruffle. The star gives you a straight stitch so that you don’t have to remove the foot in the middle of a project just to sew a straight seam. | 2.Adjustable: The knob changes how deep the pleat or ruffle is. For smaller pleats, tighten it. For larger pleats, loosen it. You can also adjust the pleats by varying the stitch length on your sewing machine | 3.Application: Use them as a fashion accent on blouses and dresses, as as border for sheer curtains, or as a flounce for bedspreads, skirts, etc . You can also create great trims with purchased ribbons. | 4.Advantages: The ruffler foot is adjustable and becomes indispensable when the amount of gathering needs to be controlled exactly, it can save much time for you. | 5.Easy to use: The ruffles are very easy to make with the ruffler foot, so you can make pleated or gathered ruffles at any time.