it goes in a double hung residential window and inserts into the spring that controls the window up & down
A quick learner from Ooltewah, TN says:
October 9, 2016
need to purchase the part in the attached photo
Mike from SWISCO responded:
October 12, 2016
Thank you for contacting us. Please look at product 20-016 tilt pin. We believe this is what you need.