Andersen Handle Extension for Frenchwood Hinged doors.
Extension Diameter: 15/16 inch
Extension Length: 1 inch
Inside Handle diameter: 1/2 inch

Andersen standard spindle length is 3 3/4\".
If using one extender a 4 3/4\" spindle is necessary.
If using two extenders a 5 3/4\" spindle is necessary.

This works with New Style Andersen Handles.
NOTE 1 - This will NOT work on the OLD STYLE Estate Handles with the 11/16 inch diameter.
Old style Newbury Estate and New style handles are not the same diameter

NOTE 2: When adding an extension the spindle that connects handles needs to be longer.
 

Andersen Handle Extensions:

2579851 Stone                        2579838  White

9007632 Gold Dust                 9007633 Black

2579821 Bright Brass             2579440 Satin Nickel

2579820 Antique Brass          2579908 Brushed Chrome

2579907 O. R. Bronze             2573787 Distressed Bronze

2573788 Distressed Nickel    2579819 Polished Chrome
 

Related Andersen Parts: 
2579831 - 4-3/4 Inch (120 mm) Spindle - Used with 1 handle Extension
2579832 - 5-3/4 inch (146 mm) Spindle - Used with 2 handle Extensions