Zipper Foot with Guide #14 is suitable for the precise, professional insertion of zippers. It resembles standard Zipper Foot #4, but features an added bar across the top of the foot which serves as a guide.

Owing to its wavy shape, this Adjustable Guide rides right over the coils of the zipper. The result is a neat, evenly inserted zipper. 

And with its ability to produce perfectly  parallel lines of straight topstitching, Zipper Foot with Guide #14 is is also a useful aid when edgestitching.