Product Details:

Awning Window Operator - Contemporary Style
For Look - Rusco Windows
Right Hand

One screw hole on top; hole is offset, not centered.
Screw holes, center-to-center, Bottom: 1-3/8"
Screw holes, center-to-center, Vertical Mounting: 5-1/4"
Straight link arm: 2-7/16" with 1/4" hole at the link end

One operator with link arm per package