Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by process]
7. image-making equipment
8. [equipment for drafting, drawing, and writing]
9. [drafting, drawing and writing equipment by specific type]
10. pens (drawing and writing implements)

Anotations

Scope note:

Instruments composed of a pen attached to a wheel with interchangeable cogs used in conjunction with a straightedge to produce a stippled line of dots, dashes, or both; used for technical and working drawings.