Casement Window Cranks

[Andy B.]

Has anyone had to replace the crank handle itself? I have one that has a stripped gear in the handle (female cog portion) and I cannot find a replacement -- or more accurately, I find way to many replacements.

How do I know that the handle I am buying will actually fit my window?

{if it matters, the handle is a "Truth" window product, but their website is no help}