Single Hung and Double Hung window Tilt latches Screw on or Slide into grooves The screw on come with assorted widths and screw hole patterns The slide in are different shapes and thickness Note: The Slide-on fingerlatch assembly slides into a route / cut out in the top of the window sash. Sometimes you can just push and it will slide out - If not, take a small block of wood and gently tap on the end till it slides out