Thanks to trusted zipper brand YKK, this Zipper Roller Foot makes invisible zippers a breeze! Whether you have a Singer, Brother, or Bernina, this zipper foot contains a variety of lettered adaptors perfect for your particular machine. After finding the adapter for your machine, replace your regular foot with this zipper foot and slide the needle left or right to align with the center of your stitch. Finally, pull the thread between the roller and foot on the left hand side.