Mac Funamizu's Door Knob concept is a brilliant art design. One of the concepts is shaped like any regular door knob, while the other is cone-shaped. Why? Well, if you've ever had trouble twisting and pushing the knob at the same time, the cone-shape makes it easier on you and your wrist.

Mac Funamizu's Door Knob Concept is a simple solution to an everyday inconvenience. Who knows, these soon could be the door knobs in your local hardware store.