Attach and remove the guides as needed to suit the task at hand. The guide give you three feet in one- 1/4 Inch Foot, Ditch Quilting and Clear Piecing foot. Markings indicate 1/8 inch and 1/4 inch from center needle drop position with handy cornering markings for both 1/8 and 1/4 inch seams. Oval-shaped needle hole allows needle adjustment for scant 1/4 inch piecing (computer models only).