Screen keeper clip

Looking to purchase a bunch of these screen keeper clips. They ride installed in a groove parallel to screen. They are T shaped. They snap into the groove, one side of the piece that snaps in in flat, other side (screen side) has the barb to keep in groove. The clips once installed can be moved up or down in the groove but I assume are meant to be kept all way down to hold screen tight. The only sticker see on a screen is vinyl single hung. The windows have no markings. Home built 2005. The screens install from the inside. 2 spring plungers on top pull down. No springers or anything else on bottom of screen. I took 2 pictures with screen out. 1 with screen in. I can't remove the clip without it by destroyed. There is a clip on each side. I have no look even seeing anything like this. Thank you. Craig cyganek.