center dimensions

A quick learner says:
Is it 12-1/4" from center to center or overall length of the 39-077 rod?
I assume that's a tightening knob at the one end?
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Dave Sr. from SWISCO responded:
That measurement is the overall length of the rod
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Donna from SWISCO responded:
Yes, the knob is to grip at the desired position.
A home owner from Bradenton, FL says:
I am installing 39-077 casement window adjusters on French doors. Any installation instructions or advice? Thanks
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Donna from SWISCO responded:
The closer you mount a Casement Window Adjuster's swivel end to the window's hinges, the wider the window opens. Hold up the hardware to the bottom of the sash and try different positions prior to installation.
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