Window casement hand crank

Hello there. It's tough to tell from this photo what crank handle you need. Can you show us the operator it connects to? A bird's eye view of the entire operator, including the arm(s) that pull the window, would be best. The identity of the operator will narrow down the crank handles you can use.

Thanks for getting back to me. It looks like that spline the handle fits onto might be 11/32" in diameter. If so, the 39-114L or folding 39-205 will work with your window operator.