HONEYSEW NARROW PLASTIC ZIPPER FOOT SNAP ON FOR SINGER DOMESTIC SEWING MACHINE 507836 The toe of the foot is narrow for more visibility and precision This is the best sewing foot for inserting zippers, snap tape, and more 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. the pin of presser foot is 2MM, it fits for singer old style sewing machine