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 profession or discipline]
7. bookbinding tools

Anotations

Scope note:

Heavy metal blocks used for ensuring that all parts of the book align correctly. The grip of the iron can be clamped into a press so that the edges of the book can be knocked firmly against the flat surface.