I just purchased a home with 15 casement windows which are opened & closed daily. The hole in the existing handle appears to be 3/8 inch. As you can see, the small area makes this a long process & usually leaves my blood behind. Also, my fingers aren't strong enough to open the window entirely.
I would prefer to remove all the existing cranks & just slip a long T handle crank around the spindle each time & then remove it to go to the next window. Is your Product Code: 39-357 the answer? Better would be a solid unit, 3-4 inches long. A T handle would be best, but if that's not available, a folding crank handle (on some windows it would hit the shutter so it couldn't turn 360) might work.
I would get a few to make the shipping expense worthwhile.
