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. [securing devices and securing device components]
10. securing devices
11. locks (securing devices)
12. [locks by location or context]
13. door locks
14. French-door locks

Anotations

Scope note:

Fastenings for French doors or casement windows that consist of sliding rods that engage with strikes or plates at the top or bottom of the frame of the portal. The rod is controlled by a handle that retracts the upper and lower parts of the bolt from the frame.