Understanding Residential and Commercial Door Hardware Functions

Description: Dummy knobs or levers have no mechanical function; they are simply pull handles without a latch or locking mechanism.

Applications: Often used on the inactive side of a double door or for decorative purposes on closet doors where latching isn’t necessary.

Description: Passage locks do not lock. They allow free entry and exit from either side of the door. This function includes a latch mechanism but lacks any locking components.

Applications: Commonly used for interior doors like hallways, closets, and rooms where privacy isn’t a concern.

Description: Privacy locks can be locked from one side, typically with a thumb turn or push button, and can be unlocked from the other side in case of emergency using a pin or small tool.

Applications: Ideal for bedrooms and bathrooms where temporary privacy is needed.

Description: Keyed entry locks can be locked and unlocked from the outside using a key and from the inside with a thumb turn or push button.

Applications: Suitable for exterior doors or any area requiring secure access control, like offices or storage rooms.

Description: Classroom locks are locked and unlocked from the outside with a key, while the inside lever or knob remains free to open the door for safety.

Applications: Designed for classrooms to secure the door from outside threats while allowing easy egress from inside.

Description: Storeroom locks remain locked on the exterior side at all times and require a key to open. The interior side has a free lever or knob to allow exit without a key.

Applications: Commonly used for storage rooms, supply closets, and maintenance areas to prevent unauthorized access.

Description: Institutional locks can only be operated with a key from both sides and are typically used in high-security environments.

Applications: Found in prisons, mental health facilities, and other secure institutions to control movement and prevent unauthorized egress.