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. [shaping and guiding equipment]
8. [shaping and guiding tools]

Narrower term/s

• set squares (tools)
• T-squares
• bevel squares
• carpenters' squares
• miter squares
• try squares
• tailor's squares

Anotations

Scope note:

Tools consisting of two perpendicular arms, usually made of wood, metal, plastic, or a combination of these materials, fixed together so as to form a right angle; used for marking right angles or testing the squareness of sides, edges, or surfaces.