Searching for K&K cranks 20544

Hello,

I would recommend starting by comparing the dimensions shown on the 39-031 and 39-032 product pages to your operator, paying close attention to the length of the shorter link arm. 

As for your sash lock, unfortunately, we don't carry this exact model but you may want to consider the 38-097 and 38-098 Entrygard Sash Locks as substitutes. If you do, you should also replace your original keepers with the 38-079. Thanks for posting!