Add tension springs to my window screens

The window screens I currently use a plastic butterfly clip as pictured in the picture. They are pressed into the top and bottom channels. The one just installs the screen and tension on the two wings holds the screen in place. Problem is I am replacing these clips every few years as they become brittle and break very easily from being exposed to environmental factors. I would like to retrofit all my screens with a leaf type tension spring. I am assuming I could drill holes in the screen and install a leaf spring ? My screens are aluminum channel with plastic corners. I doubt I could use a screen corner spring without disturbing the screening or taking the screen apart to install.

Thanks Geoff

Thanks Paul !! I'll order those. I'm assuming the 5/32 is designed that the springs stay in place on their own.

Have a great day !

Thank you, Geoff. I am also from Canada and am also having the frustration of dealing with these inferior plastic butterfly clips that secure the window screens in place. Mine broke up after just one year, as I was removing the screens so that the outside of the window could be cleaned. I can't find these 70-011 leaf springs anywhere in Canada. I've rung 3 local window/screen replacement firms locally and they tried to tell me that they can source only the plastic clips. I informed them that the better-quality, traditional leaf springs were available is they were motivated to find them. Too bad that people are accepting such a reduced standard - and throwing away all those plastic clips every couple of years. Thank you for continuing to carry the proper gear!