Aluminum keys go into 3.40 mm / 9/64
frame Width 8.40 mm. = 21/64
made of plastic both keys tilt and latches
second photo includes spline that are in storm window.
do not have photo of "spline "for screen figure standard size
Keys melted in the frame after drilling out so need to cut out with oscillating tool
Do sell replacement storms and screens ?
again thanks .This first time fixing these windows .