Handle base screw. Left.outer. PartQualifier: outer. Rear Outer. Right.outer. type 1. 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. Bolt used to secure the Interior Door Handle. Interior Door Handle Screw. HEX LOBULAR. inside. outside stud. retainer. CYLINDER AND keys. Exterior. Interior. Included with: Frame, Handle base, Parts included with handle base.