Installation Center Hole definition

A quick learner from Lafayette Indiana says:
Please describe the 6 9/16" installation hole centers for the 40-049. I have an Emtek door latch from a Pella storm door that looks identical to the one shown. However, I can not find any holes that are 6 9/16" apart.
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Paul Sr. from SWISCO responded:
Here are two images that show the distance between the installation holes.
Installation holes that measure 6-9/16"
Installation holes that measure 6-15/16"
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