1/4" Foot With Guide For Singer 221 Featherweight Sewing Machines. Foot # : ANF221 High quality patchworkers popular foot for that essential 1/4 inch seam. The guide on the foot enables you to sew a perfect 1/4 inch seam every time. The guide can also be used wherever a 1/4 inch seam is called for but the markings on the needle plate cannot be used, such as when completing a flat seam. For Singer 221 featherweight sewing machine. For Alphasew 221 sewing machine.