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. compasses (drawing instruments)

Anotations

Scope note:

Instruments consisting of a long horizontal bar on which two movable heads slide, one of which carries a pencil, and the other a pin or tracer; used to draw large circles or arcs of circles as for full-scale working drawings, cask gauging, or carpentry work.