The Dynasty Hardware Denver Single Cylinder Front Door Handleset is operated by a key from the exterior, and a thumb-turn from the interior. The door is opened from the exterior by a metal handle with thumb grip, and the Heritage Lever from the interior. The Colorado Handleset with the Heritage Lever must be ordered to either fit a Left-Hand or Right-Hand door. Determine the handing of your door by standing on the OUTSIDE of the door. If the hinges are on the Left, it's a Left-Handed door, and you need a Left-Handed handleset. If the hinges are on the Right, then you need a Right-Handed handleset.