Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by general context]
6. hardware (components)
7. [hardware by form]
8. finish hardware (hardware)
9. accessory door hardware

Anotations

Scope note:

A form of door hardware that consists of a pair of knobs on opposite ends of a spindle used to release a door latch. Distinguished from "closet knobs," which have a knob on one end of the spindle and a rose or plate on the other.