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)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at 856-317-6263 or at help@swisco.com.