casement crank handle extension

A quick learner from cleveland oh says:
February 24, 2015
I need a casement crank handle extension for a norandex series 4000 window (manufactured by atrium). I purchased your 5/16" extension but it is just slightly too small. Do you have info on what would be the right extension or at least what size I should be looking for?
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
February 25, 2015
Looking at your photos, it appears that you have a Truth operator. This hardware takes a 11/32" spline. If you can confirm, then check out our 39-157 or 39-337.
A quick learner from Cleveland, OH says:
February 25, 2015
Your ask if I can confirm that it is a Truth operator. How would I do that?
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
February 26, 2015
Open the window and look at the arms, or even remove that cover you show in your photo. Somewhere on the operator you should have the name "Truth" stamped on it. You could also look at the underside of the original crank handle for a name. The best thing to do, though, would be to measure your existing spline to see what size it is.
4" Crank Extension, 11/32"
4" Crank Extension, 11/32"
39-157
$25.59
2" Crank Handle Extension, 11/32"
2" Crank Handle Extension, 11/32"
39-337
$25.25
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