Metal window casement operator with 3/8 Inch crank handle spline.

3/8 Inch Diameter Spindle
Button is 9/16 Inch Diameter
Used on Steel Framed Windows

Hole Spacing: 
4-3/4 Inch c-c Outside holes
3-7/8 Inch c-c inside holes

Handing is determined from the inside. 
This is a Left Hand operator.
For a Right Hand operator please see 56062

Color Options:
Aluminum
Bronze
Brown
White

Contents:
1 Operator
1 Crank Handle
Installation Screws

Priced and sold each.