4" Crank Extension, 11/32"

A handy person from Western NY State says:
How do I measure my window crank to verify that my window uses 11/32"
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Tom from SWISCO responded:
You would just have to measure the bore as carefully as you can. There's not really any trick to it, just a steady hand and a ruler or tape measurer that goes into the 1/32" range. You could also use calipers, of course.
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