Impossible Cube

I can't remember where I saw a version of this puzzle, but the concept fascinated me. I was drawn to it because this object so misleads the thinking process when trying to figure out how to separate the two parts. But then the model formed in our minds is based on what we see. The brain completes the rest including hidden features. So using fusion360 I set off to design the object and test it. I made several versions of the lock inside the object, This version works best. This particular lock co