The Pintuck Foot is used for embellishing garments, table linens and bed linens, typically in conjunction with a twin needle (not included). Working with a twin needle, the foot creates evenly-spaced raised tucks in the fabric. It has a series of evenly-spaced grooves on the underside which allows for perfectly parallel rows of raised tucks that will not be flattened when sewn. Increase the upper thread tension or add a cord for more pronounced tucks. Sew intersecting rows of tucks for interesting texture on the fabric! Works best with lightweight fabrics such as batiste, silk, and organdy.
Read this great guide on how to sew pin tucks: Singer Pintuck Guide