Need square corners for window

A distributor from Villa Park, Illinois says:
These are for a window. The square m assures 5/8
The inside is hollowed out for a window. They are white. I need 4 asap.
I can use a box for our store.
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Please see our 95-197 corner key, this appears to closely match your pictured hardware.
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