blade latch tool

A handy person from Stanton; Delaware says:
is there a tool needed to make the cut-out for the 70-174 when fabricating new screens?
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Dave Sr. from SWISCO responded:
Yes there is a tool that we use when manufacturing screens to lance slots for blade latches, However it would not be cost effective for a few screens. I believe the die can run up to a few hundred dollars and you would need a punch press to attach the die to.

You could possibly use a dremel tool or a small drill.
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