I now see the difference and understand how the
90-009 will work with the
90-136. I plan to use these on some barn sash windows that I am tilting inward (from the top) to vent. The
90-009 will go on the window and the
90-136 will be mounted into the window jamb. Let me know if there is a better way to do this. My windows are 24"wide x 72" high. See pic.