Product Details:

Mechanism Only - No Operator Cover
From Truth Manufacturing

Designed for use on narrow windows.
Allows low-torque operation of narrow casement windows through a full 90º of opening.
Also adapts to an awning window application when mounted to the side jamb.
Plastic or Metal Covers and Handles for this operator mechanism are available. Please choose a handle with 11/32" Spline (Crank or T-Type).