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My neighbor found this metal tool in a box from his father’s workshop.

weird tool

It's a cube with all sorts and sizes of circles and half spheres on every edge.

What is it?

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up vote 22 down vote accepted

Die for creating sheetmetal hemispheres. There should be a set of punches with round ball ends somewhere in that mix, unless someone misused them for something else or lost them.

Doming Block and Punch Set is one term for the tool set. The die is also called a dapping block. You can find them at jewelry tool suppliers.

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That’s the one! +1 for a specific product name I could look up. – Zev Eisenberg Jul 20 '14 at 18:26

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