This Andersen Operator Adapter Plate is used to adapt the 1999-present operator to fit a 1995-1998 unit. It will work with both casement and awning straight arm and split arm operator. The 1999 to present operator must be ordered separately. You can verify if you will need to order the adapter by identifying the number of grooves on the frame to accept the operator lugs. If your frame has one or no grooves, then the adapter plate isn’t needed. Visit either our St. John, IN or Mokena, IL locations and check out our Andersen Windows & Doors Showrooms, today!