It keeps the fixed screen dorr fixed on the top and bottom, Pella
A quick learner from PA says:
March 7, 2015
It secures the fixed double screen door at the top and bottom
Donna from SWISCO responded:
March 9, 2015
Hello, thank you for contacting us. Could you be looking for our 40-014 Pella Screen Door Flush Bolt? If not, can you take a few pictures of your hardware so we can find something closer?