width of square part is 1" width of angled part that sticks in window is 9/16"
Bob from SWISCO responded:
October 7, 2019
Thanks for writing in, and thanks for your patience. I'm not sure if we have ane exact match for this internal tilt latch. You may be better off converting to surface-mount tilt latches like our 26-228 and 26-229. See the video below.