Extension for an Anderson casement window

A home owner from NY says:
Will the 39-157 extension fit an Anderson casement window spline?
Profile picture of Donna
Donna from SWISCO responded:
No,the 39-157, crank extension, only fits 11/32" spline.
We do not have anything similar for Andersen.
A quick learner says:
will this fit a 3/8 spline?
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
The Swisco 39-157 crank extension fits an 11/32" spline.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)