What is this? This is the worst doorknob that mankind has ever designed, patented, and produced.Unfortunately, our house is equipped with five of these masterpieces. As you can see, it readily separates into at least two pieces. The metal rod that you can see doesn't quite fit the hole it's supposed to fit in, so even when the whole miserable assembly is in situ, it rattles around. It rattles around in the lock, and it works its way loose from the horrible glass knob as well. Basically, there could not be a more annoying doorknob. I actually prefer using a screwdriver which fits the hole and, despite being removable, doesn't have to be adjusted twice a week.