This diecast zinc window operator is used with a square torque bar.  The rotating receiver in the operator is 7/16" square.

Approximate overall size:

• 2-3/16" high
• 1-3/8" wide
• 1/2" thick

Approximately mounting hole spacing:

• Two top holes are 3/4" apart
• Two holes vertically arranged along long side are 1-3/4" apart. 
• Two holes next to each other are approximately 7/16" apart.