How to measure spline for T Handles

A quick learner says:
I need to replace a regular crank handle with a t handle can you tell me how to measure for a compatable spline? but how can I call you to determine the fit. also can it be in brushed nickel or a silver look? thanks Robin
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
View of the spline opening of the 39-102 crank handle.
Hope this picture helps. A great way to determine the handle is to identify the operator. Look on the operator itself to see if there is a name on it. A good place to check is the operator arm. To do this, remove the window screen & crank open the window. You should see a name on the long operator arm. Also, do you have a Wood, Vinyl or Aluminum window? Wood & vinyl windows usually have a 11/32" spline similar to our 39-102 (but not all the time). Aluminum or metal windows usually have a 5/16" or a 3/8", similar to our 39-108 .
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