How to machine screen bar to fit 70-172?

A distributor from Winnipeg says:
We make windows and doors in Winnipeg Canada. I am interested in 70-172 knife latch. I just wondering how do you machine the screen bar to fit in this part. Do you have a special tool?

Zhen
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Donna from SWISCO responded:
Thanks for posting! We are currently working on this part, and I will post again in this thread as soon as I have more information available for you to view.
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Donna from SWISCO responded:
Thank you for your patience in this matter. Please take a look at our new 75-059 Screen Frame Lancing Kit. I believe this may be what you're looking for. Let me know what you think!
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