SWISCO - The Replacement Hardware Authority

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
Dave from SWISCO responded:
The Swisco 39-157 crank extension fits an 11/32" spline.
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