Keeps sides of windows in alignment

Thanks for posting. Take a look at our 67-002 Face Guide. See if you could use this as a substitute. This guide sometimes is used with a #8 x 1/2" Flat Head screw like our 33-080, but you'll want to go with whatever was originally used in your window to be safe. Let us know if you have further questions. 

That's great to hear! Please let us know if you need anything else.