This foot is great for zipper application and also to make and insert piping. A set screw in the back makes this foot completely adjustable from far left to far right. Metal.
Hinged Slant-shank Zipper Foot 161166 - Singer
Made in Great Britain.
This is the best sewing foot for inserting zippers, snap tape, and more. The toe of the foot is narrow for more visibility and precision. Adjust the needle to either the right or left to sew both sides of your zipper easily. You can also use it to attach piping or decorative cording.