This set contains one outside foot and one inside foot. The outside foot has a single toe which allows close stitching to the zippers and edge sewing. The outside toe is on the left side. Zipper will go to the Right side of the foot. Outside foot have teeth on the bottom.
And many other comparable walking foot machines.
Presser Foot Shank Type: Industrial Walking Foot
Presser Foot Type: Zipper / Cording / Welting / Piping