Cranial perforator - GIF

Cranial perforator.

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Previously:

https://www.homemadetools.net/forum/...041#post140930
https://www.homemadetools.net/forum/...159#post126129
https://www.homemadetools.net/forum/...470#post181896
https://www.homemadetools.net/forum/...409#post177448
https://www.homemadetools.net/forum/...574#post166797

very clever

Probably very expensive also.

You should hope that your cranium never needs perforation...

Trepanation was utilized as far back as ancient Egypt. Recovered skulls show perforations with bone growth around the edges so at least some patients survived the procedure. So how did ancient surgeons do it with only stone, some bronze, tools?