Handle base screw. Left. Right. A screw that is used to secure the Exterior Door Handle Base to it's mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Door Handle Base to it's mounting point. Bolt that secures the exterior door handle. Interior Door Handle Screw. inside. outside bolt. outside stud. Interior. Included with: Handle base.