This is a diecast operator and crank handle for an awning window or roof vent.
It is meant to be used on 6 inch standard vent windows.
It is nonhanded--can be used as either left or right hand operator.
Center of top installation hole to center of bottom installation hole: 5-1/8 inch
It has a steel arm and is zinc plated.

You will receive 1 operator, 1 crank handle and 1 set of installation screws.