Roto X-Drive Awning Operator for Wood Windows, Sill mounted Handle not included.

Brand: Roto
Application, Sill Mount, wood windows
Arm Length: 13-3/8 inch
Outer screw hole centers: 3-3/16 inch
Body Width: 4-9/16 inch
5/16 inch diameter, projected Hex spline

Related Roto Awning Window Parts:
57051 - Mounting Bracket, Face mount
57050 - Mounting Bracket, Surface mount

Note:
The X-Drive and Pro Drive are the same operator that uses a different crank handle.
The Pro drive operators have a hex shaped hole in the operator and the handle with a 5/16" hex stud pushes into operator.
The X-Drive has a 5/16" Hex spline that protrudes from the base and the handle fits onto it.