These are grid retainers from what I was told were wood Atrium windows. Trouble being Atrium doesn't make wood windows so I'm stuck.
Dave Sr. from SWISCO responded:
July 31, 2014
I'm not sure how your clip works. It looks like it goes behind the wood trim on the window. We have two type of clips that work like that: see our 55-182 and 55-176. Take a look at them and see if they could work for you.